Glossar - Last Updated: October 23, 2025









    • 5-alpha reductase deficiency
      • An intersex condition in which XY chromosomes (“male” chromosomes) and testes are present, but a shortage of the hormone dihydrotestosterone (DHT) causes incomplete external genitalia to be formed.
  • A
    • Abortifacient
      • A drug, herb, or device that can cause an abortion (end a pregnancy).
    • Abortion
      • Ending a pregnancy.
    • Abortion pill
      • Describes the process of medication abortion, which includes the use of two medications, mifepristone and misoprostol, to safely end a pregnancy.
    • Abstinence
      • Not having sex with anyone.
    • Abstinence-only programs
      • A form of “sex education” that teaches abstinence (not having sex) as the only morally correct option for unmarried people. They don’t include information about protection from STDs or pregnancy. See "abstinence-only-until-marriage programs."
    • Ace
      • Short for asexual, meaning the sexual orientation, or spectrum of identities, associated with experiencing no sexual attraction towards anyone.
    • Acquaintance rape
      • Sexual assault by someone the victim knows.
    • Acquired immune deficiency syndrome (AIDS)
      • The most advanced stage of HIV.
    • Adolescence
      • The period of physical and emotional change between the beginning of puberty and early adulthood.
    • Adrenarche
      • The time in early puberty when secondary sex characteristics, like pubic hair, begin to develop.
    • Affordable Care Act (Patient Protection and Affordable Care Act)
      • Law signed by President Barack Obama in 2010 that set in motion sweeping changes to the U.S. health care system, including the requirement that most private health insurance plans cover people with pre-existing conditions, preventive care including birth control with no out of pocket costs, and a requirement that young people can stay on their parent or guardian’s insurance until they are 26 years old. The law is frequently called ACA, for short, or Obamacare.
    • Afterbirth
      • The placenta and other tissue that empty out of the uterus following childbirth.
    • Age of consent
      • The age at which state law considers a person old enough to decide to have sex with someone.
    • Agender
      • Not identifying with any gender.
    • AIDS (acquired immune deficiency syndrome)
      • The most advanced stage of HIV.
    • AIS (androgen insensitivity syndrome)
      • A biological intersex condition that makes a fetus with XY chromosomes unable to develop male sex organs, causing female genitals at birth and throughout life. Usually raised as girls, individuals with AIS do not have reproductive organs, do not menstruate, are infertile, and can have vaginas that are too shallow for penis-in-vagina sex.
    • Alfred Kinsey (1894–1956)
      • Influential American sex researcher of the 20th century. His research was unique and groundbreaking. In extensive interviews, he and his team of researchers took thousands of case histories to learn about people’s sexual identities and experiences. Although his sample did not precisely reflect the full range of diversity of the American people, he and his team provided us with important data from which we’ve learned a great deal.
    • Ally
      • Someone who’s on the same side as you. Often used to describe someone who takes a stand against oppression or discrimination who is not a member of the oppressed group — for example, a white person who speaks out against racism or a straight person who speaks out against homophobia.
    • Alternative insemination
      • See "donor insemination.”
    • Amenorrhea
      • Not having a period (menstruating).
    • Amniocentesis
      • A prenatal test that examines the fluid that surrounds and protects the fetus. If done, it’s usually performed between 15–18 weeks of pregnancy to detect certain birth defects.
    • Amniotic fluid
      • The liquid that surrounds the fetus within the amniotic sac.
    • Anal sex
      • Sex in which the penis or a sex toy goes in the anus.
    • Androgen insensitivity syndrome (AIS)
      • A biological intersex condition that causes a fetus with XY chromosomes to have a vulva at birth rather than a penis and scrotum Often raised as girls, individuals with AIS don’t have reproductive organs, don’t menstruate, are infertile, and can have vaginas that are too shallow for penis-in-vagina sex.
    • Androgens
      • Hormones that stimulate male genital development in the womb and secondary male sex characteristics during puberty. Large amounts are produced in testicles and small amounts are produced in ovaries. The most common androgen is testosterone.
    • Androgynous
      • Appearing to have both, neither, or in between traditionally male and female physical characteristics.
    • Andropause
      • A gradual decline in sex drive as people with penises age, due to decreasing levels of testosterone. Similar to menopause.
    • Androphobia
      • Fear of men.
    • Anesthesia
      • Medicine that protects against pain during medical procedures. Topical anesthesia numbs the skin. Local anesthesia numbs a small area of the body, like the cervix. General anesthesia makes you be asleep and numb so you don’t feel or remember anything. Conscious sedation numbs the body while allowing a person to remain awake, but deeply relaxed.
    • Anilingus
      • Oral sex with a partner’s anus. Also known by the slang term “rimming.”
    • Anorexia
      • An eating disorder in which people don’t eat or eat dangerously little.
    • Anorgasmia
      • Inability to have an orgasm or difficulty in having an orgasm.
    • Anti-choice
      • Opposed to the belief that people have the right to make their own choices about whether and when to have a child.
    • Antibiotics
      • Medicines that are used to cure infections caused by bacteria.
    • Antibody
      • A protein developed by the immune system in response to a toxin in the body.
    • Antiretroviral
      • A medicine that fights viruses. Antiretroviral therapy (ART) is a treatment for HIV patients that can help them stay healthy, and lower their chances of giving HIV to someone else.
    • Anus
      • The opening from the rectum (butt) from which solid waste (poop) leaves the body.
    • Aphrodisiac
      • A substance that increases sexual desire.
    • Areola
      • The dark area surrounding the nipple.
    • ART (antiretroviral therapy)
      • A combination of medicines that works to keep people living with HIV healthy by lowering the amount of the virus in their bodies.
    • Artificial insemination
      • See the preferred term, “donor insemination.”
    • Asexuality
      • Sexual orientation or identity associated with experiencing no sexual attraction for anyone.
    • Aspiration abortion
      • A procedure that ends pregnancy by emptying the uterus with the gentle suction of a manual syringe or with machine-operated suction. Also called “in-clinic abortion.”
    • Asymptomatic
      • Having no signs or symptoms. Many STDs are asymptomatic in their early stages.
    • Atrophic vaginitis
      • Vaginal irritation without any discharge caused by lowered levels of estrogen. Sometimes caused by menopause and more rarely, by breastfeeding.
    • Autoerotic
      • Being turned on by yourself or something you think of in your own mind.
    • Autoerotic asphyxiation
      • Strangling or choking yourself for sexual arousal. It can be very dangerous. Hundreds of young people die of autoerotic asphyxiation every year.
  • B
    • Backup birth control
      • Any birth control method — like condoms or withdrawal — that’s used while waiting for hormonal birth control methods to become effective (or to become effective again after a mistake or problem). Some people also refer to emergency contraception as backup birth control.
    • Bacterial vaginosis (bv)
      • Inflammation of the vulva/vagina (vaginitis) caused by a change in the balance of vaginal bacteria. It’s not an STD. Things like douching or having sex with a new partner can lead to BV.
    • Balanitis
      • An inflammation of the glans and foreskin of the penis that can be caused by infections (including STDs), harsh soaps, poor hygiene, etc. It’s most common in uncircumcised penises.
    • Barrier methods of birth control
      • Birth control that blocks sperm from passing through the cervix (the barrier between the vagina and uterus). These include the condom, female condom, diaphragm, cervical cap, spermicide, and sponge.
    • Bartholin’s glands
      • Two glands that provide lubrication (wetness) to the vagina during sexual excitement (arousal, being turned on). Located in the inner labia on each side of the opening to the vagina.
    • Basal body temperature method
      • A birth control method that involves tracking your body temperature over time to predict ovulation. Can be used to prevent pregnancy or to plan a pregnancy.
    • Bdsm
      • A term for a variety of sexual practices including bondage, discipline, domination/submission, and sadism/masochism.
    • Benign
      • Not dangerous.
    • Bi erasure / invisibility
      • The tendency to ignore the existence or legitimacy of bisexuality.
    • Bigender
      • Having two genders. Identifying as both a man and a woman, for example.
    • Bilateral mastectomy
      • The surgical removal of both breasts. Performed to treat/prevent breast cancer or for gender affirmation. See "chest surgery" or “top surgery.”
    • Biopsy
      • When a doctor or nurse takes a small sample of tissue to examine in a lab and make a diagnosis.
    • Biphobia
      • Fear, hatred, or mistrust of bisexuals.
    • Birth canal
      • The passage from the uterus through the cervix and vagina through which a baby is born.
    • Birth center
      • A special health facility for people giving birth and their families.
    • Birth Control
      • Something that prevents pregnancy.
    • Birth defect
      • A physical abnormality or health issue present at birth. May be considered outdated or offensive. “Congenital disorder” is the preferred term.
    • Bisexual
      • Being sexually attracted to both men and women. Sometimes used to describe people who are sexually attracted to people of all genders, including non-binary genders.
    • Bladder
      • The organ that collects and stores urine (pee). The bladder is emptied through the urethra.
    • Blastocyst
      • The developing hollow ball of cells that grows from a fertilized egg, before it implants in the uterus.
    • Blue balls
      • Slang for an uncomfortable — but not dangerous — feeling in the penis/testicles that may occur when you don’t ejaculate after being very turned on.
    • Body image
      • Attitudes and feelings that a person has about their body and appearance.
    • Boner
      • Slang for an erect (hard) penis.
    • Bottom surgery
      • A general term for a variety of genital surgeries that transgender individuals may choose to get to align their physical body with their gender identity. See “gender-affirming surgery” or “gender-alignment surgery.”
    • Breastfeeding
      • Feeding a baby with human milk from the breast. Can also be used as a birth control method for the first 6 months after birth, if done correctly.
    • Breasts
      • The two glands on the chest. Considered sex organs because they’re often sexually sensitive and may inspire sexual desire. Like mammary glands in other mammals, they produce milk during and after pregnancy.
    • Bulbourethral glands
      • The glands beneath the prostate gland that are attached to the urethra. They produce pre-ejaculate (pre-cum), preparing for ejaculation by temporarily stopping the ability to urinate (pee) and making it easier for semen to move. Also called “Cowper’s glands.”
    • Butch
      • Slang for dressing like or taking on roles that are traditionally “masculine,” especially in regard to lesbians or gender-nonconforming individuals. Some people may call themselves butch, while others find the term offensive.
    • Butt plug
      • A sex toy that goes in the anus. It’s designed to stay in place with a flared base.
    • Bv (bacterial vaginosis)
      • Inflammation of the vulva/vagina (vaginitis) caused by a change in the balance of vaginal bacteria. It’s not an STD. Things like douching or having sex with a new partner can lead to BV.
  • C
    • C-section
      • Giving birth when a doctor surgically removes the baby from the uterus. Short for cesarean section.
    • Calendar method
      • A fertility awareness-based method for predicting fertility in which users chart their menstrual cycles on a calendar. Can be used to plan a pregnancy or as birth control if cycles are tracked over many months.
    • Cancer
      • A disease in which abnormal cells grow out of control in a part of the body.
    • Candida
      • A type of yeast that causes vaginal yeast infections when it becomes overgrown. Yeast infections may also occur in the penis or scrotum, or the mouth/throat. When they happen in the mouth or throat, they’re called “thrush.”
    • Cap
      • Short for a cervical cap, a birth control method. A cervical cap is a cup made from soft silicone and shaped like a sailor's hat. It goes inside the vagina to cover the cervix. Used with spermicide, the cervical cap is a reusable barrier method of birth control that’s available by prescription. The FemCap is the only cervical cap available in the U.S.
    • Castration
      • Removal of the testicles. See "chemical castration."
    • Casual sex
      • Sex between people who aren’t in a relationship with each other.
    • Celibacy
      • Not having sex.
    • Censorship
      • When something is forbidden because it’s thought to be offensive or dangerous.
    • Cervical cap
      • A cervical cap is a cup made from soft silicone and shaped like a sailor's hat. It goes inside the vagina and covers the cervix. Used with spermicide, the cervical cap is a reusable barrier method of birth control that’s available by prescription. The FemCap is the only cervical cap available in the U.S.
    • Cervical mucus
      • The secretion that comes from the divider between the uterus and vagina. The amount of cervical mucus and what it looks like changes throughout the menstrual cycle, especially around the time of ovulation. It can naturally help sperm move, or help stop sperm from moving if you’re using hormonal birth control.
    • Cervical mucus method
      • A fertility awareness-based method for predicting fertility by tracking changes in the appearance and quantity of cervical mucus. Can be used for planning a pregnancy or as birth control if tracked over many months.
    • Cervicitis
      • An irritation of the cervix. May include abnormal discharge from the cervix that can look and feel like vaginal discharge.
    • Cervix
      • The narrow, lower part of the uterus, with a small opening connecting the uterus to the vagina.
    • Cesarean section
      • Giving birth when a doctor surgically removes the baby from the uterus. Called “c-section” for short.
    • Chancre
      • A sore on the skin or mucus membrane that’s caused by syphilis during the first phase of infection.
    • Chancroid
      • A sexually transmitted bacteria that causes open genital sores, called buboes. Chancroid is very rare today, especially in the U.S.
    • Chastity belt
      • A device designed to prevent people from having sex. Used from medieval to modern times, these devices were also supposed to preserve morality. Some were meant to ensure fidelity in women. Others were designed to prevent masturbation.
    • Chemical castration
      • Injecting progestin into someone with a penis/scrotum to decrease sexual desire and arousal. In some countries, sex offenders can be sentenced to chemical castration.
    • Chest binding
      • Wrapping breast tissue in order to flatten it and create a more masculine-appearing chest.
    • Chest surgery / chest reconstruction surgery
      • Surgical reconstruction to create a more female- or more male-appearing chest. Sometimes referred to as “top surgery.”
    • Child pornography
      • Images of children designed to be sexually arousing. Making, distributing, and consuming child pornography are serious crimes.
    • Chlamydia
      • A very common STD that’s caused by a bacteria and can be cured with antibiotics. If left untreated, chlamydia can cause infertility and arthritis.
    • Chorionic villus sampling (CVS)
      • A prenatal test that examines the tissue that attaches a fetus to the wall of the uterus. If a doctor or nurse recommends it, CVS is usually performed between 10–12 weeks of pregnancy to detect certain genetic or biological disorders.
    • Circumcision
      • A surgical procedure to remove the foreskin of the penis or part of the clitoris. See ”female circumcision.”
    • Cis man
      • A man who identifies as the gender he was assigned at birth — in this case, male. A man who isn’t transgender.
    • Cis woman
      • A woman who identifies as the gender she was assigned at birth — in this case, female. A woman who isn’t transgender.
    • Cisgender
      • Those who identify as the sex they were assigned at birth. For example, a baby born with a vulva is categorized a girl. If she also sees herself as a girl throughout her life, she is considered cisgender.
    • Climax
      • An orgasm or to have an orgasm.
    • Clinician
      • A qualified health care professional, such as a doctor, nurse, nurse practitioner, or physician assistant. Also called “health care provider.”
    • Clit
      • Short for clitoris.
    • Clitoral hood
      • A small flap of skin formed by the inner labia that covers and protects the clitoris.
    • Clitoral reduction
      • A surgery to shorten the clitoris. Sometimes provided as part of gender affirming surgery. If it’s done without the patient’s consent, it’s a form of female genital mutilation.
    • Clitoridectomy
      • Removal of the external clitoris. See "female genital mutilation."
    • Clitoris
      • Sex organ whose only known purpose is sexual pleasure. The clitoris swells with blood during sexual excitement. The outer part of the clitoris is located at the top/front of the vulva, right next to urethra (hole you pee out of). The inner part of the clitoris, which is much larger, includes a shaft and two crura (roots or legs) of tissue that extend up to five inches into the body on both sides of the vagina to attach to the pubic bone.
    • Closet
      • “Being in the closet,” or “being closeted,” means not sharing or not being able to share your LGBTQ identity with yourself or others.
    • CMV (cytomegalovirus)
      • An infection that can be passed through sexual contact, childbirth, or breastfeeding. In healthy adults, CMV usually doesn’t cause any symptoms. In babies or adults with a compromised immune system, it can cause symptoms including pneumonia, seizures, etc.
    • Coercion
      • Forcing someone to do something they don’t want to do, often with threats or emotional manipulation.
    • Coitophobia
      • Fear of vaginal sex.
    • Coitus
      • Sex in which the penis enters the vagina. Also called “vaginal sex” or ”vaginal intercourse.”
    • Colostrum
      • Breast milk produced towards the end of pregnancy and for a few days right after childbirth. It’s low in fat but high in cells that help infants fight infections.
    • Colposcope
      • A tool with a bright light and magnifying lens that’s used to look at the cervix for a colposcopy. Colposcopes aren’t inserted into the body.
    • Combination pill
      • A birth control pill that contains 2 hormones: estrogen and progestin.
    • Combined hormone contraceptives
      • Birth control methods — the pill, the patch, the ring — that contain 2 hormones: estrogen and progestin.
    • Combined oral contraceptives
      • Birth control pills that contain 2 hormones: estrogen and progestin.
    • Coming out
      • The process of accepting and being open about one’s identity, such as being lesbian, gay, bisexual, transgender, queer, or questioning. Short for “coming out of the closet.”
    • Complete miscarriage
      • A miscarriage (when a pregnancy ends on its own) in which all the pregnancy tissue is passed without medical treatment.
    • Comprehensive sex education
      • A medically accurate, age appropriate curriculum or intervention that includes information about abstinence, birth control, STD prevention, healthy relationships, sexual orientation/gender identity, accessing health care services, and helps build skills around communication and healthy decision making.
    • Comstock act
      • An 1873 law that made it a federal crime to use the U.S. mail to distribute anything considered “obscene, lewd, lascivious, indecently filthy, or vile,” including information about abortion, contraception, and sexual health. Many state “Comstock laws” were also passed around the turn of the 20th century.
    • Conception
      • The beginning of pregnancy. The moment when the pre-embryo attaches to the lining of the uterus and pregnancy begins.
    • Condom
      • Thin, stretchy pouches worn on the penis during sex. Mostly made from latex or plastics (like polyurethane and polyisoprene). Sometimes made from lambskin. Condoms are an over-the-counter barrier method of birth control that also provide protection from STDs with one exception — lambskin condoms don’t protect against STDs.
    • Congenital syphilis
      • Syphilis that’s passed from parent to fetus during pregnancy, leading to bone disorders, loss of sight or hearing, deformities, stillbirth, or death of a newborn.
    • Contraception/contraceptive
      • Any behavior, device, medication, or procedure used to prevent pregnancy. Also known as birth control.
    • Contraceptive creams and jellies
      • Substances containing spermicide, which block sperm and prevent it from joining with an egg. These are over-the-counter, one time use barrier methods of birth control. They work best if used with a cervical cap, diaphragm, or condom.
    • Contraceptive film
      • A thin, two-inch square sheet of spermicide that’s inserted deep into the vagina, where it melts into a thick liquid that blocks the entrance to the uterus. It blocks sperm and prevents it from joining with an egg. An over-the-counter one time use barrier method of birth control. Most effective when used with a condom.
    • Contraceptive foam
      • A substance that’s inserted deep into the vagina. Contraceptive foam blocks the entrance to the uterus with bubbles that contain a spermicide to block sperm, preventing it from joining with an egg. An over-the-counter, one time use barrier method of birth control. Most effective when used with a condom.
    • Contraceptive suppository
      • A solid capsule containing spermicide that’s­ inserted deep into the vagina, and melts into a liquid to block sperm, preventing it from joining with an egg. An over-the-counter, one time use barrier method of birth control. Most effective when used with a condom.
    • Contraction
      • The on-again, off-again tightening of the uterus during childbirth, which causes intense cramping.
    • Copay
      • A set amount of money agreed upon by a patient and an insurance company that the patient must pay out of pocket for medical services and prescriptions.
    • Copulation
      • Another way of saying vaginal sex, or sometimes sexual activity in general.
    • Corpus cavernosa
      • Two strips of erectile tissue in the glans, shaft, and crura of the clitoris and along the sides of the penis that extend back into the pelvic floor. During sexual excitement, they fill with blood and become erect.
    • Corpus luteum
      • A mass of cells that temporarily form on an ovary and produce progesterone following the release of an egg each month.
    • Corpus spongiosum
      • Erectile tissue that forms the glans of the clitoris and penis. In the penis, it runs from the glans along the underside of the shaft, surrounding the urethra.
    • Couvade syndrome
      • Pregnancy symptoms experienced by the partner of a pregnant person. Also called “sympathetic pregnancy.”
    • Cowper’s glands
      • Produce pre-ejaculate (AKA pre-cum), a clear fluid that prepares the urethra for ejaculation. Pre-ejaculate also reduces friction in the urethra, making it easier for semen to pass through. Also called “bulbourethral glands.”
    • Cremaster
      • The muscle that elevates the testicles as the temperature gets colder or when the front or inner thigh is touched.
    • Cremaster reflex
      • The automatic response of the cremaster muscle, which elevates the testicles when exposed to cold or stimulation.
    • Cross-dresser
      • A person — typically a cisgender man — who sometimes wears feminine clothing in order to have fun, entertain, gain emotional satisfaction, for sexual enjoyment, or to make a political statement about gender roles.
    • Crura
      • Internal extensions of the corpus cavernosa of the clitoris and penis that attach to the pubic bone.
    • Cryotherapy
      • The removal of abnormal or unwanted tissue — like warts and other growths — by freezing them.
    • Cryptorchidism
      • A condition in which one or both testicles do not descend into the scrotum within 3 months of birth.
    • Cum
      • Slang for "ejaculate," the sperm-containing fluid that comes out of the penis usually during an orgasm. Also another way of saying “to have an orgasm.”
    • Cunnilingus
      • Oral sex using the mouth to stimulate the clitoris, vulva, and vagina.
    • Curette
      • A small, metal loop used to scrape tissue. Used in dilation and curettage.
    • Cushing syndrome
      • A condition associated with pituitary gland problems.
    • CVS (chorionic villus sampling)
      • A prenatal test that examines the tissue that attaches the fetus to the wall of the uterus. If recommended by a doctor or nurse, it’s usually done between 10–12 weeks of pregnancy to detect certain genetic or biological conditions.
    • Cybersex
      • Sexual encounters that take place online, using video cams, e-mail, or instant messaging.
    • Cyberstalking
      • To track and follow someone’s online presence and communications in a threatening way.
    • Cystitis
      • An infection of the bladder. Also called a “urinary tract infection” or “UTI.”
    • Cytomegalovirus (CMV)
      • An infection that can be passed through sexual contact, childbirth, or breastfeeding. In healthy adults, CMV usually doesn’t cause any symptoms. In babies or adults with a compromised immune system, it can cause symptoms including pneumonia, seizures, etc.
  • D
    • D & c (dilation and curettage)
      • The use of a curette — a metal medical instrument with a narrow loop — to gently scrape away the uterine lining, and the use of suction to remove tissue from the uterus. Can be used for abortion care or for treatment of a miscarriage.
    • D & e (dilation and evacuation)
      • The use of suction and medical tools to remove tissue from the uterus during an abortion.
    • Date rape
      • Forced sexual contact from someone the victim is knows or is dating. Also sometimes called “acquaintance rape.”
    • Deductible
      • A set amount of money that a person with insurance is required to pay for health care before their health insurance will start covering any costs.
    • Dental dam
      • A thin, square piece of latex that helps prevent the spread of STDs when placed over the vulva or anus during oral sex.
    • Depo-provera
      • The brand name of the birth control shot. The shot is a hormone that’s injected into the butt or arm every 3 months to prevent pregnancy.
    • Depotmedroxyprogesterone acetate (dmpa)
      • A type of the hormone progestin, which is found in Depo-Provera (the birth control shot).
    • Desire phase
      • The first stage of the sexual response cycle.
    • Diaphragm
      • A birth control device made of soft silicone and shaped like a shallow cup. The diaphragm t covers the cervix to prevent pregnancy. Used with spermicide, the diaphragm is a reversible barrier method of birth control available only by prescription.
    • Dilation and curettage (d & c)
      • The use of a curette — a metal medical instrument with a narrow loop — to gently scrape away the uterine lining, and the use of suction to remove tissue from the uterus. Can be used for abortion care or for treatment of a miscarriage.
    • Dilation and evacuation (d & e)
      • The use of medical instruments and suction to gently remove tissue from the uterus during an abortion.
    • Dilators
      • A series of increasingly thick rods made of plastic, metal, or natural fiber that are used to stretch open the cervix.
    • Dildo
      • A penis-shaped sex toy used to stimulate the vagina or anus.
    • Dmpa
      • A type of the hormone progestin, which is in Depo-Provera (the birth control shot). The D stands for depot, the solution in which the hormone is suspended. MPA stands for the hormone medroxyprogesterone acetate.
    • Doe v. bolton
      • The U.S. Supreme Court decision, issued on the same day as Roe v. Wade, that struck down restrictions on facilities that can be used for abortion services, which allowed them to be performed in clinics as well as hospitals.
    • Domestic partnership
      • A committed, long-term relationship of two unmarried people who live together.
    • Donor insemination
      • Putting semen in the vagina or uterus without vaginal intercourse in order to produce a pregnancy. Also called "alternative insemination."
    • Double standard
      • Unequal expectations, moral standards, or rules that allow one group to have more privileges than another group within a society. A sexual double standard, for example, usually places more restrictions on women than on men.
    • Douche
      • A spray of water, medication, or cleanser, which goes into the vagina.
    • Doula
      • A person who gives emotional support during pregnancy, labor, and childbirth and for some time after.
    • Down syndrome
      • A range of conditions caused by a fetus having an extra copy of chromosome 21 (trisomy 21).
    • Drag
      • Exaggerated cross-dressing for entertainment.
    • Drag king
      • A female performer who exaggerates male behaviors and dress for the purposes of entertainment at bars, clubs, or events. Some drag kings might identify as transgender.
    • Drag queen
      • A male performer who exaggerates female behaviors and dress for the purposes of entertainment at bars, clubs, or events. Some drag queens might identify as transgender.
    • Dry days
      • Days during the menstrual cycle when little cervical mucus is produced.
    • Dry humping
      • Body rubbing with clothes on.
    • Dry orgasm
      • Orgasm from a penis without ejaculation (when semen comes out of the penis).
    • Dysmenorrhea
      • Pain or discomfort during menstruation.
    • Dyspareunia
      • Painful vaginal sex.
    • Dysplasia
      • Abnormal cell growth that can be an early sign of cancer.
  • E
    • Eclampsia
      • A life-threatening medical condition that can happen during the second half of pregnancy. Symptoms include bluish skin, dizziness, mental confusion, pains in the stomach, problems with eyesight, twitching muscles, and vomiting. Eclampsia can be prevented by good prenatal care.
    • Ectopic pregnancy
      • A life-threatening pregnancy that develops outside the uterus, often in a fallopian tube. See “tubal pregnancy.”
    • Egg
      • The reproductive cell stored in the ovaries and released during ovulation. Pregnancy happens when sperm enters an egg, grows into a ball of cells, and implants into the uterus.
    • Eisenstadt v. baird
      • The 1972 U.S. Supreme Court decision that made it legal for unmarried people to use birth control.
    • Ejaculation
      • The moment when semen spurts out of the opening of the urethra in the glans of the penis.
    • Ejaculatory inevitability
      • The moment during sex or masturbation when it becomes impossible to stop ejaculation. It happens when the prostate begins to contract and pulse out seminal fluid. Also called “point of no return.”
    • Embryo
      • The organism that develops from a pre-embryo during the second month of pregnancy. This stage of the pregnancy lasts about 5 weeks. Embryos then develop into fetuses.
    • Emergency contraception
      • A safe and effective way to prevent pregnancy after unprotected sex. Emergency contraception pills made from hormones and copper IUDs are the two methods of emergency contraception.
    • Endometriosis
      • A condition in which endometrial tissue (the tissue that lines the uterus) grows outside the uterus, causing pain, especially before and during menstruation.
    • Endometrium
      • The lining of the uterus, which grows every month in order to nourish a fertilized egg. The lining is shed during menstruation (your period) if a fertilized egg doesn’t implant (pregnancy).
    • Endorphin
      • A hormone that keeps pain away.
    • Enovid
      • The brand name of the first birth control pill.
    • Epididymis
      • The tube that leads from the testes to the vas deferens. Sperm are stored in the epididymis before ejaculation. It’s tightly coiled on top of and behind the testes.
    • Epididymitis
      • An inflammation of the epididymis.
    • Epidural
      • An injection of painkillers used during childbirth.
    • Episiotomy
      • A surgical cut into the perineum (the tissue between the bottom of the vulva and the anus) to help childbirth and reduce damage to vaginal and perineal tissue.
    • Equal rights amendment (ERA)
      • A proposed amendment to the U.S. Constitution which has never been adopted. It was originally pushed forward by the National Women’s Party in 1923, which would have guaranteed that “equality of rights under the law shall not be denied or abridged by the United States or by any state on account of sex.” The ERA’s long history ended in 1979 when it failed to be ratified by three-quarters of the states.
    • ERA (equal rights amendment)
      • A proposed amendment to the U.S. Constitution which has never been adopted. It was originally pushed forward by the National Women’s Party in 1923, which would have guaranteed that “equality of rights under the law shall not be denied or abridged by the United States or by any state on account of sex.” The ERA’s long history ended in 1979 when it failed to be ratified by three-quarters of the states.
    • Erectile dysfunction
      • The inability to get or keep a hard penis.
    • Erectile tissue
      • Spongy tissue in the penis/clitoris that stiffens when filled with blood.
    • Erection
      • A “hard” penis — when it’s becomes full of blood and stiffens. See "vasocongestion."
    • Erogenous zone
      • Any area of the body that’s sensitive to sensual touch, or feels sexual.
    • Erotic
      • Sexually arousing.
    • Erotica
      • Literature or art that is meant to be sexually arousing.
    • Erotophobia
      • Fear of the erotic.
    • Escort
      • Someone who takes someone somewhere. At reproductive health centers, escorts are volunteers who help people get safely inside during anti-choice demonstrations. Escort can also sometimes mean sex worker.
    • Estrogen
      • A hormone made in the ovaries, and in much smaller amounts in the adrenal glands at the top of your kidneys, and sometimes even fat tissue. Estrogen plays a part in puberty, the menstrual cycle, and pregnancy. Many people take extra estrogen after menopause or as part of transgender care.
    • Eugenics
      • A racist, classist, and ableist movement to control who should and shouldn’t have children.
    • Eunuch
      • A person whose testicles, and less often, penis, have been removed.
    • Excitement
      • The body’s physical response to desire and to stimulation. The second stage of the sexual response cycle.
    • Exhibitionists
      • People who expose their sex organs to other people in public places.
    • External sex and reproductive organs
      • The sex organs and structures that you can see. These include the vulva, penis, and scrotum.
    • Extramarital sex
      • Sex by a married person with someone other than their spouse.
  • F
    • Fallopian tube
      • One of two narrow tubes that carry an egg from the ovary to the uterus during ovulation.
    • False negative
      • A test result that incorrectly says that the condition tested for is not present.
    • False positive
      • A test result that incorrectly says that the condition tested for is present.
    • Family planning
      • Making plans and taking actions, like using birth control, to have the number of children you want, when you want them.
    • Fams (fertility awareness-based methods)
      • A name for several ways to track ovulation — the release of an egg — in order to prevent pregnancy. Some people call FAMs "natural family planning.”
    • Fantasy
      • A thought, idea, or daydream that causes sexual excitement.
    • Fasd (fetal alcohol spectrum disorders)
      • Health conditions that are caused by alcohol use during pregnancy. They include damage to the brain, heart, and nervous system as well as physical malformation and intellectual disability. Fetal Alcohol Syndrome (FAS), Alcohol-Related Neurodevelopmental Disorder (ARND), and Alcohol-Related Birth Defects (ARBD) are all fetal alcohol spectrum disorders.
    • Federal abortion ban
      • The federal law passed in 2003 and upheld in 2007 that bans certain kinds of abortion procedures as early as 12 to 15 weeks in pregnancy. The federal ban includes no exception for the patient’s health and forces doctors to stop using procedures they believe are safest and best for their patients.
    • Fellatio
      • Oral sex on a penis. Also called a “blow job.”
    • Female
      • One of two possible legal/medical gender categories, assigned at birth. Also describes when someone has XX chromosomes.
    • Female circumcision
      • The practice of removing part or all of the clitoral hood, clitoris, or vulva as part of a cultural or religious ritual. In some cases, the vulva is sewn together to preserve virginity. See “female genital mutilation.”
    • Female condom
      • A polyurethane pouch that goes inside the vagina or anus for pregnancy and/or STD prevention. Female condoms are sometimes called internal condoms or referred to by their brand name, FC2 Female Condom®.
    • Female ejaculation
      • The release of fluid out of the urethra during intense sexual excitement or orgasm. The fluid comes from the Skene’s glands, which are located in the vulva near the opening of the urethra. Sometimes called “squirting.”
    • Female genital mutilation (fgm)
      • The practice of removing part or all of the clitoral hood, clitoris, or vulva as part of a cultural or religious ritual. In some cases, the vulva is sewn together to preserve virginity. See “female circumcision.”
    • Female prostate glands
      • Term used by some scientists to describe the Skene’s glands in a woman’s vulva, which may secrete a fluid similar to the fluid produced by the prostate gland.
    • Female-to-male trans (ftm) (f2m)
      • A trans person whose sex assignment at birth was female but whose gender identity is male. May prefer the identity trans man, or simply man. These identities can also refer to someone who was surgically assigned female at birth, in the case of intersex people, but whose gender identity is male.
    • Femcap (FemCap)
      • The brand of cervical cap available in the US; a silicone cup shaped like a sailor’s cap that fits inside the vagina to cover the cervix. Used with spermicide, the cervical cap is a reusable barrier method of birth control that’s available by prescription.
    • Feminine
      • Characteristics and ways of appearing and behaving that a culture associates with being a girl or a woman.
    • Feminism
      • The belief that people of all genders should have equitable economic, political, sexual, and social rights.
    • Femme
      • An identity associated with a gender presentation that is considered “feminine.”
    • Fertility
      • The ability to have children or cause a pregnancy.
    • Fertility awareness-based methods (fams)
      • A name for several ways to track ovulation — the release of an egg — in order to prevent pregnancy. Some people call FAMs "natural family planning.”
    • Fertility cycle
      • Another way of saying the menstrual cycle. The monthly pattern of ovulation, the shedding of the lining of the uterus (menstruation), and the body’s preparation for another ovulation.
    • Fertility rate
      • The number of live births per 1,000 women of reproductive age (15–44).
    • Fertilization
      • The joining of an egg and sperm.
    • Fetal alcohol spectrum disorders (FASDs)
      • Health conditions that are caused by alcohol use during pregnancy. They include damage to the brain, heart, and nervous system as well as physical malformation and intellectual disability. Fetal Alcohol Syndrome (FAS), Alcohol-Related Neurodevelopmental Disorder (ARND), and Alcohol-Related Birth Defects (ARBD) are all fetal alcohol spectrum disorders.
    • Fetus
      • Develops from the embryo at 10 weeks of pregnancy and receives nourishment through the placenta.
    • Fibroid
      • A benign tumor that grows on the walls of the uterus.
    • First trimester
      • The first 3 months of pregnancy.
    • Fisting
      • Putting several fingers or a hand into the vagina or anus of a sex partner.
    • Flashing
      • Exposing one’s breasts or sex organs. See "exhibitionists."
    • Follicle
      • A sac in the ovary that holds a maturing egg.
    • Follicle stimulating hormone (FSH)
      • Made by the pituitary gland, this hormone stimulates the growth of an egg/the development of sperm in men.
    • Fondling
      • Touching someone in a sexual way.
    • Fordyce spots
      • Small yellowish or white bumps or spots on the inside of the cheeks or lips, on the glans or shaft of the penis, or on the vulva. 50 to 100 may appear in one area. They’re completely harmless, aren’t sexually transmitted, and aren’t infectious.
    • Foreplay
      • Kissing, rubbing, stroking, and/or touching that leads to sex. Foreplay can prolong and/or increase sexual excitement and pleasure.
    • Foreskin
      • A tube of skin that covers and protects the glans (head) of the penis, and rolls back when the penis becomes erect. A circumcised penis has had the foreskin removed.
    • Fornication
      • Sex between unmarried people that’s considered wrong by a cultural or religious group.
    • Frenulum
      • On the vulva, it’s the highly sensitive tissue where the inner labia join below the glans of the clitoris. On the penis, it’s the highly sensitive, triangular piece of skin just below the glans (head).
    • Frottage
      • Sexual body rubbing. Also called “dry humping.”
    • Fsh (follicle stimulating hormone)
      • Made by the pituitary gland, this hormone stimulates the growth of an egg/the development of sperm in men.
    • Ftm (f2m)
      • A trans person whose sex assignment at birth was female but whose gender identity is male. May prefer the identity trans man, or simply man. These identities can also refer to someone who was surgically assigned female at birth, in the case of intersex people, but whose gender identity is male.
  • G
    • G spot (grafenburg spot)
      • An area inside the vagina that’s highly sensitive to touch, along the upper wall of the vagina. Stimulation of the G spot can lead to intense sexual arousal and orgasm for some people.
    • Gamete
      • A cell that fuses with another cell during fertilization. In humans, eggs and sperm are gametes.
    • Gamete intrafallopian tube transfer (GIFT)
      • A type of assisted reproductive procedure, in which an egg is taken from a person’s ovary, mixed with semen, and then put back in one of their fallopian tubes.
    • Gang rape
      • A sexual assault perpetrated by 2 or more people.
    • Gaslighting
      • A form of emotional abuse in which a person tries to confuse someone into not believing their own memories, thoughts, or feelings.
    • Gay
      • When someone is only attracted to people of the same gender.
    • Gay bashing
      • Physical or verbal violence against people who are perceived to be lesbian, gay, bisexual, or transgender.
    • Gay liberation movement
      • The national call to establish civil rights for lesbian, gay, bisexual, and transgender women and men from the late 1960s to the mid 1980s.
    • Gender
      • A social and legal status of male or female. A set of expectations from society about behaviors and characteristics. Each culture has standards about the way that people should behave based on whether they’re male or female.
    • Gender affirming surgery
      • Surgery on sex organs or secondary sex characteristics to match one’s gender identity.
    • Gender assignment
      • The medical and legal description of one’s sex, determined at birth.
    • Gender binary
      • The idea that there are only 2 categories of gender (male and female) that are mutually exclusive and different from each other.
    • Gender dysphoria
      • A diagnosis, often used by psychologists and doctors, to describe the distress, unhappiness, and anxiety that transgender people may feel about the mismatch between their bodies and their gender identity. A person may need to be formally diagnosed with gender dysphoria in order to receive medical treatment to help them transition. Psychologists used to call this “gender identity disorder.” However, the mismatch between a person’s body and gender identity isn’t in itself a mental illness.
    • Gender expression
      • How a person chooses to show their gender on the outside using clothes, hairstyles, or other markers. A person’s gender expression doesn’t have to match their gender identity. For example, a person who likes to wear masculine clothes may still identify as a woman.
    • Gender fluidity
      • A sense that one’s gender identity or expression is not set in stone, and that it can change over time or even from day to day. For some people, gender fluid is a gender identity. A gender fluid person may feel male on some days, female on others, both male and female, or neither. A gender fluid person might also identify as genderqueer.
    • Gender identity
      • A person’s inner feelings about themselves. Gender identity is how someone views their own gender and what they call themselves. Someone’s gender identity doesn’t have to match their sex assigned at birth. Some examples of gender identity include identifying as a man, woman, or gender non-binary.
    • Gender identity disorder (GID)
      • An outdated psychiatric diagnosis (see “gender dysphoria”).
    • Gender non-binary
      • When a person’s gender identity doesn’t fit inside traditional male or female categories (sometimes called the gender binary).
    • Gender nonconforming
      • When a person’s gender expression doesn’t fit inside traditional male or female categories (sometimes called the gender binary).
    • Gender normative
      • Someone or something that conforms to social standards on appropriate feminine and masculine behavior.
    • Gender norms
      • Social standards on appropriate feminine and masculine behavior.
    • Gender roles
      • Social standards on appropriate feminine and masculine behavior.
    • Gender scripting
      • The socialization process by which one is conditioned over their lifetime to adopt certain attitudes, behaviors, and preferences considered appropriate for one’s gender, either feminine or masculine.
    • Gender stereotype
      • Exaggerated expectations of the way boys/men or girls/women should behave.
    • Genderqueer
      • A term for people who don’t identify as a man or a woman or whose identity lies outside the traditional gender binary of male and female. Some people use genderqueer, gender non-conforming, and non-binary interchangeably, but others don’t. Genderqueer has a political history, so many use the term to identify their gender as non-normative in some way. For example, someone could identify as both cisgender female and genderqueer.
    • Genes
      • Microscopic chains in your cells that carry information about you that’s unique to you, but includes pieces from your biological family - everything from eye color, to height, to body type, to personality.
    • Genital herpes
      • A common STD in the area of the anus, cervix, penis, vagina, or vulva. Very often there are no symptoms, while the most common symptom is a cluster of blistery sores. Since it’s a virus, there is no cure, but there is treatment available.
    • Genital reconstruction surgery (GRS)
      • Surgery on the genitals. Sometimes done for intersex or transgender people to align their genitals with their gender identity (also known as “gender affirmation surgery”). Can also be done after genital injury, circumcision, or mutilation.
    • Genital warts
      • Soft, flesh-colored growths on or near the penis/vulva, caused by some types of HPV (human papilloma virus). They are usually painless, but may itch.
    • Genitals
      • External sex and reproductive organs, like the the vulva, penis, and scrotum.
    • Genophobia
      • Fear of sex.
    • Gestation
      • The period of time when a fetus is developing in the womb.
    • Gestational age
      • The length of a pregnancy. Measured from the first day of the last menstrual period.
    • GID (gender identity disorder)
      • An outdated psychiatric diagnosis (see “gender dysphoria”).
    • GIFT (gamete intrafallopian tube transfer)
      • A type of assisted reproductive procedure, in which an egg is taken from a person’s ovary, mixed with semen, and then put back in one of their fallopian tubes.
    • Gigolo
      • An old fashioned word for a male sex worker.
    • Glans
      • The soft, highly sensitive tip of the clitoris or penis. Also called the “head” of the penis.
    • Gonadotropins
      • Hormones released by the pituitary gland. They trigger puberty by stimulating the ovaries or testes.
    • Gonads
      • The organs that produce reproductive cells — the ovaries and testes.
    • Gonorrhea
      • A bacterial STD that’s easy to treat, but if left untreated can lead to infertility, arthritis, and heart problems. Often has no symptoms.
    • GRS (genital reconstruction surgery)
      • Surgery on the genitals. Sometimes done for intersex or transgender people to align their genitals with their gender identity (also known as “gender affirmation surgery”). Can also be done after genital injury, circumcision, or mutilation.
    • Gräfenburg spot (G spot)
      • An area inside the vagina that’s highly sensitive to touch, along the upper wall of the vagina. Stimulation of the G spot can lead to intense sexual arousal and orgasm for some people.
    • Guiche
      • A slang word for the perineum, the skin between the vulva and anus or scrotum and anus. May also refer to piercing that area with a metal ring to increase sexual pleasure.
    • Gymnophobia
      • Fear of nudity.
    • Gynecologist
      • A doctor who specializes in health care for the vulva, vagina, uterus, ovaries, and breasts.
    • Gynecology
      • Health care specializing in the vulva, vagina, uterus, ovaries, and breasts.
    • Gynecomastia
      • The swelling of breast tissue in people assigned male at birth. It’s caused by a change in hormone balance — common during puberty, and eventually goes away.
    • Gynophobia
      • Fear of women.
  • H
    • Hand job
      • Slang for someone using their hand to rub/stimulate someone else’s penis.
    • HBV (hepatitis b virus)
      • A viral infection that can be sexually transmitted. It can lead to dangerous liver problems in some people.
    • Health care provider
      • A licensed doctor, nurse, nurse practitioner, nurse-midwife, or physician assistant.
    • Health coverage (health insurance)
      • A plan or program that covers some or all medical expenses for each member. The plan or program could be provided by an employer, government-sponsored, or purchased by an individual.
    • Health insurance
      • A plan or program that helps pay for the medical expenses of their members, like medicine, doctor visits, and surgery.
    • Heavy petting
      • Touching a partner’s genitals in a sexual way.
    • Hedonism
      • The belief that pleasure is the most valuable thing to pursue.
    • Hepatitis b virus (HBV)
      • A viral infection that can be sexually transmitted. It can lead to dangerous liver problems in some people.
    • Hermaphrodite
      • An outdated and offensive word. A better term is “intersex.”
    • Herpes
      • A common STD caused by two different but similar viruses: herpes simplex virus type 1 (HSV-1) and herpes simplex virus type 2 (HSV-2). Both kinds can make blistery sores show up on and around the genitals or mouth.
    • Heteronormativity
      • The cultural assumption that everyone is straight (heterosexual) until they tell you otherwise.
    • Heterosexism
      • The belief that heterosexuality is better than other sexual orientations.
    • Heterosexual
      • Being attracted to people of the other gender.
    • High-risk pregnancy
      • A pregnancy that is more likely to have complications for the pregnant person or their fetus.
    • HIV (human immunodeficiency virus)
      • A chronic virus that breaks down the immune system. Can lead to AIDS if not treated.
    • Homophobia
      • Fear or hatred of people who are gay, lesbian, or bisexual.
    • Homosexual
      • Being attracted to people of the same gender.
    • Hormonal contraceptives
      • Birth control methods that use hormones to prevent pregnancy. These include the implant, the hormonal IUD, the pill, the patch, the ring, and the shot.
    • Hormone replacement therapy (HRT)
      • 1. A combination of hormones (like estrogen or testosterone) or hormone-blockers used in transgender care to help patients have secondary sex characteristics in line with their gender identity. 2. In menopause and postmenopause, estrogen and sometimes progestin can relieve symptoms such as hot flashes and vaginal dryness.
    • Hormone therapy
      • 1. A combination of hormones (like estrogen or testosterone) or hormone-blockers used in transgender care to help patients have secondary sex characteristics in line with their gender identity. 2. In menopause and postmenopause, estrogen and sometimes progestin can relieve symptoms such as hot flashes and vaginal dryness.
    • Hormones
      • Chemicals that cause changes in our bodies and brains. They naturally exist and can also be made in a lab.
    • Horny
      • Slang for wanting to have sex or for being sexually aroused.
    • Hot flashes / hot flushes
      • A sudden, sometimes intense feeling of heat in the face or upper body that happens during perimenopause and menopause.
    • HPV (human papilloma virus)
      • The most common STD. Some types of HPV may cause genital warts. Others may cause cancer of the anus, cervix, penis, throat, or vulva. Most of the time HPV is harmless and goes away on its own.
    • HRT (hormone replacement therapy)
      • 1. A combination of hormones (like estrogen or testosterone) or hormone-blockers used in transgender care to help patients have secondary sex characteristics in line with their gender identity. 2. In menopause and postmenopause, estrogen and sometimes progestin can relieve symptoms such as hot flashes and vaginal dryness.
    • HSV-1 (herpes simplex virus-1)
      • One type of the herpes virus. HSV-1 typically infects the mouth, causing cold sores. More rarely, HSV-1 can infect the genitals. HSV-1 is extremely common and may not always be transmitted sexually, as skin-to-skin contact is all that’s needed to pass it on.
    • HSV-2 (herpes simplex virus-2)
      • One type of the herpes virus. HSV-2 typically infects the genitals, causing clusters of sores. More rarely, HSV-2 can infect the mouth. It’s generally passed by sexual skin-to-skin contact.
    • Human immunodeficiency virus (HIV)
      • A chronic virus that breaks down the immune system. Can lead to AIDS if not treated.
    • Human papilloma virus (HPV)
      • The most common STD. Some types of HPV may cause genital warts. Others may cause cancer of the anus, cervix, penis, throat, or vulva. Most of the time HPV is harmless and goes away on its own.
    • Hyde amendment
      • A 1977 law, first sponsored by Rep. Henry Hyde (R-IL), that forbids the use of federal funds to pay for abortion services.
    • Hymen
      • A thin, fleshy piece of tissue that stretches across part of the opening to the vagina.
    • Hyperfemininity
      • The exaggeration of gender-stereotyped feminine behavior.
    • Hypermasculinity
      • The exaggeration of gender-stereotyped masculine behavior.
    • Hypersexual
      • Having more libido or a higher sex drive than most people.
    • Hyposexual
      • Having less libido (sexual desire) than most people.
    • Hypothalamus
      • A part of the brain that controls hormones, including hormones related to sexual desire and mood.
    • Hysterectomy
      • Surgery to remove the uterus.
    • Hysteroscope
      • A long, thin tool that lets a nurse or doctor see inside the uterus.
  • I
    • Immune system
      • The body’s natural protection against infection and disease.
    • Implanon
      • The brand name of an older birth control implant. The newer version of Implanon is called Nexplanon. The implant is a small rod, about the size of a matchstick, that prevents pregnancy for up to 4 years. A doctor or nurse inserts the implant under the skin of the upper arm. It releases the hormone progestin to prevent pregnancy.
    • Implant
      • A small rod, about the size of a matchstick, that prevents pregnancy for up to 4 years. A doctor or nurse inserts the implant under the skin of the upper arm. It releases the hormone progestin to prevent pregnancy.
    • Implantation
      • When a pre-embryo attaches to the lining of the uterus. This is when pregnancy begins. Usually starts about 6 days after fertilization (when egg and sperm meet) and takes 3 to 4 days to complete.
    • Implantation bleeding
      • Light vaginal bleeding that sometimes happens when a pre-embryo attaches to the lining of the uterus and pregnancy begins.
    • Impotence
      • The inability to have an erection (get hard). “Erectile dysfunction” is now the preferred term.
    • In vitro fertilization (IVF)
      • Any method of assisted reproduction in which fertilization takes place outside the body (usually in a lab) in an effort to get someone pregnant.
    • In-clinic abortion
      • A procedure done in a health center, doctor’s office, or hospital that ends a pregnancy.
    • In-network
      • Describes a health care provider (like a doctor or nurse) or service (like an x-ray) that’s covered by your insurance plan so people insured under the plan pay a discounted rate.
    • Incest
      • Sexual activity between members of the same family.
    • Incomplete abortion
      • A kind of miscarriage or abortion in which some pregnancy tissue passes out of the uterus but some stays inside. Sometimes treatment is needed to remove the remaining tissue.
    • Incontinence
      • Being unable to control urination or bowel movements.
    • Indecent exposure
      • Illegal, public display of genitals or breasts. Also called “flashing.”
    • Induced abortion
      • The intentional termination of pregnancy.
    • Induced menopause
      • Menopause that happens as a result of ovaries being removed or damaged.
    • Inevitable miscarriage
      • Miscarriage that’s medically certain to happen in the near future.
    • Infant mortality rate
      • Number of deaths of infants under one year of age per 1,000 live births.
    • Infatuation
      • Intense, usually short-lived, emotional or sexual attraction to another person.
    • Infertility
      • The inability to become pregnant or to cause a pregnancy.
    • Infibulation
      • The most severe form of female genital mutilation. It includes removing the outside clitoris and labia, and sewing the opening of the vagina closed.
    • Infidelity
      • Failing to keep a promise to be monogamous, usually in the context of a marriage.
    • Inhibited sexual arousal
      • The inability to become physically sexually aroused, despite one’s desire. May affect vaginal lubrication or the ability to have an erection. Not the same thing as asexuality.
    • Inner lips
      • The labia of the vulva that surround the clitoris and the openings to the urethra and vagina. Also called "labia minora."
    • Insemination
      • Putting sperm into the vagina, cervix, uterus, or fallopian tubes to cause a pregnancy.
    • Intact penis
      • A penis with a foreskin, also called uncircumcised.
    • Intercourse
      • Sexual activity in which the penis goes into the vagina (vaginal intercourse) or the anus (anal intercourse).
    • Internal sex and reproductive organs
      • The organs inside the body that are responsible for reproduction. Internal reproductive organs that respond to sexual stimulation (like the vagina) are also called sex organs.
    • Internalized homophobia
      • Fear of being homosexual or negative feelings towards oneself for being homosexual.
    • Intersex
      • A general term used for a variety of conditions in which a person is born with a reproductive or sexual anatomy that doesn’t fit the typical definitions of female or male. Sometimes a female or male gender is assigned to an intersex person at birth through surgery, if external genitals are not obviously male or female. Intersex babies are always assigned a legal gender, but sometimes when they grow up, they don’t identify with the gender selected for them.
    • Intimacy
      • The closeness you feel when you share your private and personal self with someone else.
    • Intimate partner violence (IPV)
      • A pattern of emotional, verbal, physical, or sexual abuse in the context of an intimate relationship. Also called "domestic violence," "partner abuse," "relationship abuse," and "dating violence."
    • Intrauterine contraceptive (IUC)
      • Another way of saying IUD. A tiny device that’s placed in the uterus to prevent pregnancy. It’s safe, long-term, reversible, and one of the most effective birth control methods available. One IUD, the Paragard, use copper to prevent pregnancy. Others use hormones to prevent pregnancy.
    • Intrauterine device (IUD)
      • A tiny device that’s placed in the uterus to prevent pregnancy. It’s safe, long-term, reversible, and one of the most effective birth control methods available. One IUD, the Paragard, use copper to prevent pregnancy. Others use hormones to prevent pregnancy.
    • Intrauterine system (IUS)
      • Another way of saying IUD. A tiny device that’s placed in the uterus to prevent pregnancy. It’s safe, long-term, reversible, and one of the most effective birth control methods available. One IUD, the Paragard, use copper to prevent pregnancy. Others use hormones to prevent pregnancy.
    • IPV (intimate partner violence)
      • A pattern of emotional, verbal, physical, or sexual abuse in the context of an intimate relationship. Also called "domestic violence," "partner abuse," "relationship abuse," and "dating violence."
    • IUC (intrauterine contraceptive)
      • Another way of saying IUD. A tiny device that’s placed in the uterus to prevent pregnancy. It’s safe, long-term, reversible, and one of the most effective birth control methods available. One IUD, the Paragard, use copper to prevent pregnancy. Others use hormones to prevent pregnancy.
    • IUD (intrauterine device)
      • A tiny device that’s placed in the uterus to prevent pregnancy. It’s safe, long-term, reversible, and one of the most effective birth control methods available. One IUD, the Paragard, use copper to prevent pregnancy. Others use hormones to prevent pregnancy.
    • IUS (intrauterine system)
      • Another way of saying IUD. A tiny device that’s placed in the uterus to prevent pregnancy. It’s safe, long-term, reversible, and one of the most effective birth control methods available. One IUD, the Paragard, use copper to prevent pregnancy. Others use hormones to prevent pregnancy.
    • IVF (in vitro fertilization)
      • Any method of assisted reproduction in which fertilization takes place outside the body (usually in a lab) in an effort to get someone pregnant.
  • J
    • Jaundice
      • Yellowing of eyes, skin, and mucous membranes due to diseases of the liver. Can also happen in newborn infants if the liver isn’t fully functional yet. In infants treatment often isn’t needed, but treatment is available.
    • Jealousy
      • Feelings of anxiety about a partner or crush’s attention, love, or commitment. Fear that a partner has feelings for someone else.
    • Jock itch
      • A very common fungal skin infection on the scrotum, penis, or groin area. Caused by wearing tight clothing, sweating a lot, or not drying the genitals carefully after bathing. Jock itch can cause a reddish, scaly rash that can become inflamed, itchy, and painful.
  • K
    • Kegel exercises
      • The tightening and releasing of the muscles that stop urination in order to prevent and improve urinary incontinence, improve sexual sensation, and aid recovery of vaginal muscle tone after childbirth. Because they exercise internal muscles, kegels can be done anywhere, anytime.
    • Kink / kinky
      • An uncommon sexual behavior or preference.
    • Kinsey scale
      • A scale used to demonstrate the spectrum of sexual orientations. Designed by Alfred Kinsey and his associates in the late 1940s and early 1950s. The seven points on the scale show the range that people reported in Kinsey's surveys, from “exclusively heterosexual” to “exclusively homosexual.”
    • Klinefelter’s syndrome
      • An intersex condition where someone is born with one Y and two X chromosomes (XXY). Sometimes diagnosed during puberty, sometimes not until adulthood, depending on symptoms. Symptoms can include a small penis, abnormal body proportions, and infertility.
  • L
    • Labia
      • The lips of the vulva.
    • Labia majora
      • The outer lips of the vulva.
    • Labia minora
      • The inner lips of the vulva.
    • Labor
      • The process of childbirth, including everything from the contractions of the uterus and dilation of the cervix to delivery of the infant and finally the placenta.
    • Lactational amenorrhea method (LAM)
      • Using exclusive breastfeeding about every 4 hours as a method of birth control. Works for up to 6 months after childbirth, or until you get your period (whichever comes first).
    • Lactobacillus
      • A healthy bacteria found in the vagina. Helps prevent vaginitis by limiting the growth of candida, a yeast.
    • LAM (lactational amenorrhea method)
      • Using exclusive breastfeeding about every 4 hours as a method of birth control. Works for up to 6 months after childbirth, or until you get your period (whichever comes first).
    • Laparoscope
      • A tool used in medical procedures, like tubal sterilizations, to see inside the belly or pelvis. It’s a thin rod with a light and a camera that’s inserted through a small cut in the belly.
    • Laparoscopy
      • A safe and non-invasive procedure. Uses a laparoscope (thin rod that goes through a small incision in the belly) to examine or do a biopsy of the uterus, ovaries, or fallopian tubes. Can also be used for certain types of tubal sterilization.
    • Laparotomy
      • A method of tubal sterilization that involves major surgery, requiring a two- to five-inch belly incision through which the fallopian tubes are located and blocked.
    • LEEP
      • Stands for Loop Electrosurgical Excision Procedure. A treatment that prevents cervical cancer. A small electrical wire loop is used to remove abnormal cells from the cervix. LEEP may be performed after abnormal cells are found during a Pap test, colposcopy, or biopsy.
    • Lesbian
      • A woman who’s sexually or romantically attracted to other women.
    • Lesbophobia
      • Fear of lesbians.
    • Lesophobia
      • Fear of strong women.
    • Leukorrhea
      • A white or yellow colored vaginal discharge that happens during puberty, pregnancy, and other times when hormone levels are changing.
    • Levonorgestrel
      • A synthetic progestin similar to the hormone progesterone, which the body makes to regulate the menstrual cycle. Used in hormonal birth control, including most brands of emergency contraception.
    • LGBTQ
      • Stands for lesbian, gay, bisexual, transgender, and questioning (or, alternatively, “queer.”)
    • LH (luteinizing hormone)
      • One type of gonadatropin, a hormone secreted by the pituitary gland. A quick rise in this hormone in the body, known as the “LH surge,” triggers ovulation in females. In males, LH regulates testosterone.
    • Libido
      • Feeling of sexual desire.
    • Limbic system
      • The area of the brain and nerve system that controls emotions, drives, and desires.
    • Limerence
      • An obsessive infatuation; lovesickness.
    • Lobes
      • Groups of tissue (about 15-20 in each breast) inside female breasts. Where breast milk is made.
    • Love
      • A strong caring for someone else. It comes in many forms. There can be love for romantic partners and also for close friends, for parents and children, for pets, for nature, or for something religious/spiritual.
    • Low birth weight
      • Weighing less than 5.5 pounds (5 lbs 8 oz) when born. About 1 out of 12 babies are born with low birth weight. Low birth weight babies are at higher risk of many health problems.
    • Lube / lubricant
      • A water-based, silicone-based, or oil-based product used to increase slipperiness and reduce friction during sex.
    • Lumpectomy
      • When part of the breast is removed because it contains cancer or other abnormal tissue.
    • Lust
      • Sexual desire for someone.
    • Luteinizing hormone (LH)
      • One type of gonadatropin, a hormone secreted by the pituitary gland. A quick rise in this hormone in the body, known as the “LH surge,” triggers ovulation in females. In males, LH regulates testosterone.
  • M
    • Male menopause
      • Andropause, the gradual decline in sexual vigor as men age, due to decreasing levels of testosterone.
    • Male-to-female trans (MTF) (M2F)
      • A trans person who was assigned male at birth, but whose gender identity is female. May prefer the identity trans woman, or simply woman. Can also refer to someone who was surgically assigned male at birth, in the case of intersex people, but whose gender identity is female.
    • Mammary glands
      • The organs that produce breast milk.
    • Mammogram
      • Breast cancer screening that takes X-rays of the breasts to detect cancer before they can be felt.
    • Manual vacuum aspiration (MVA)
      • An early abortion procedure in which a small, hand-held suction device or suction machine gently takes the pregnancy tissue out of the uterus.
    • Margaret Sanger (1883-1966)
      • Founder of Planned Parenthood Federation of America. She established the first birth control clinic in the U.S. in 1916. In 1948, she helped found the International Planned Parenthood Federation.
    • Marital rape
      • Forced sex within marriage.
    • Marriage
      • The socially and legally recognized union of a couple as spouses.
    • Masculine
      • Characteristics and ways of appearing and behaving that society associates with being a boy or a man.
    • Mastectomy
      • The surgical removal of a breast.
    • Mastitis
      • An inflammation of the breast usually caused by an infection.
    • Masturbation
      • Touching one’s own body/genitals for sexual pleasure.
    • Maternal mortality
      • Death during or shortly after pregnancy.
    • Mayer-Rokitansky-Küster-Hauser (MRKH)
      • An intersex condition in which the vagina and uterus are underdeveloped or absent.
    • Medication abortion / medical abortion
      • The use of a combination of drugs to end a pregnancy. Also called the “abortion pill.”
    • Menarche
      • The first time a person gets their period.
    • Menopause
      • When menstruation stops because of hormonal changes. Usually happens between the ages of 45 and 55, but sometimes menopause happens earlier due to certain medical conditions.
    • Menorrhagia
      • Menstrual bleeding that’s heavier or longer lasting than usual.
    • Menses
      • The blood and discharge that comes out of the uterus and through the vagina during menstruation.
    • Menstrual cup
      • A latex or silicone receptacle that fits in the vagina to collect menstrual flow.
    • Menstrual cycle
      • The time from the first day of one period to the first day of the next period. During the menstrual cycle, the lining of the uterus grows, an egg is released by the ovaries, and the uterine lining sheds.
    • Menstrual flow
      • Blood and discharge that are passed out of the uterus through the vagina during the beginning of the menstrual cycle.
    • Menstrual synchrony
      • When 2 or more people have their periods at the same time.
    • Menstruation
      • The flow of blood, fluid, and tissue out of the uterus and through the vagina that usually lasts from 3 to 7 days. Often called a period.
    • Merkin
      • A wig for the pubic area.
    • Metastasize
      • To spread from one part of the body to another, as in when cancer spreads.
    • Method effectiveness
      • How well a particular type of birth control prevents pregnancy.
    • Micropenis
      • A penis that’s small enough to be considered abnormal.
    • Midwife
      • A person trained to assist in childbirth.
    • Mifepristone
      • One of two drugs (the other is misoprostol) used for a medication abortion. Commonly known as “the abortion pill.” The brand name in the U.S is Mifeprex.
    • Mini-laparotomy
      • A surgical procedure that can used for tubal sterilization. It involves making a small incision on the lower abdomen through which the fallopian tubes can be located and blocked.
    • Mini-pills
      • Birth control pills that contain only the hormone progestin. More correctly called “progestin-only pills.”
    • Miscarriage
      • When an embryo or fetus dies before the 20th week of pregnancy.
    • Misogyny
      • Dislike, contempt for, or hatred of women.
    • Misoprostol
      • A medication that can be used to complete a medication abortion that’s been induced with mifepristone. This process is commonly known as the abortion pill. Although less effective than mifepristone, misoprostol is used alone for abortion in some countries.
    • Missed abortion / missed miscarriage
      • When a pregnancy ends, but the tissue remains in the uterus. Sometimes this can lead to a person continuing to experience pregnancy symptoms for a time. Treatment is sometimes needed to remove the tissue from the uterus.
    • Missionary position
      • The position for vaginal sex in which the man lies on top of the woman, face-to-face.
    • Mittelschmerz
      • Lower belly pain that some people experience during ovulation.
    • Molar pregnancy
      • When a fertilized egg grows into a benign tumor instead of an embryo/placenta.
    • Molluscum contagiosum
      • A virus that can be sexually transmitted, causing small, pinkish-white, waxy, round, polyp-like growths in the genital area or on the thighs.
    • Monogamy
      • When 2 people decide to have sex only with each other and no one else.
    • Mons veneris
      • The fleshy, triangular mound above the vulva that’s covered with pubic hair in adults. It cushions the pubic bone.
    • Mooning
      • Exposing one’s butt to other people.
    • Morning sickness
      • Nausea and vomiting that happens during the first trimester of pregnancy.
    • Morning wood
      • Slang for having an erect penis when waking up. People who have penises can have several erections at night as part of their sleep cycle. Very often, when they wake up, they’re still erect. Also called “nocturnal penile tumescence.”
    • Morning-after pill
      • Emergency contraception that can be used within 120 hours (5 days) of unprotected vaginal sex to decrease the chance of pregnancy.
    • Morula
      • A ball of cells that develops from a fertilized egg, and eventually grows into an embryo.
    • MTF (M2F) (male-to-female trans)
      • A trans person who was assigned male at birth, but whose gender identity is female. May prefer the identity trans woman, or simply woman. Can also refer to someone who was surgically assigned male at birth, in the case of intersex people, but whose gender identity is female.
    • Mucus method
      • A fertility awareness-based method for predicting fertility by tracking changes in the appearance and quantity of cervical mucus. Can be used for planning a pregnancy or as birth control if tracked over many months.
    • Multiparous
      • Having given birth more than once.
    • Multiple marker screening
      • A prenatal blood test that happens between 15-20 weeks of pregnancy to look for indications of conditions like Down syndrome, brain and spine defects, and others. Also called a triple test or quad test.
    • Multiple orgasms
      • The occurrence of more than 1 orgasm within one sexual experience.
    • Mutual masturbation
      • When people masturbate in each other’s presence.
    • Ménage à trois
      • Three people in a sexual encounter. Also called a threesome or threeway.
    • Ménage á trois
      • Three people in a sexual encounter. Also called a threesome or threeway.
  • N
    • Natural childbirth
      • Using little or no medication during labor and delivery. Reducing pain by addressing fear and tension, exercising and training abdominal and uterine muscles beforehand, and using relaxed breathing during labor.
    • Natural family planning
      • Using fertility awareness-based methods of contraception (See “fertility awareness-based methods”).
    • Necrofilia
      • When a person needs is sexually aroused by dead bodies.
    • Necrophilia
      • When a person is sexually aroused by dead bodies.
    • Negative result
      • A test finding that shows that the condition tested for is not present.
    • Neonatal
      • Regarding a newborn infant.
    • Neurula
      • The stage of pregnancy when a neural tube develops, marking the beginning of an embryo.
    • Nipple
      • The dark tissue in the center of the areola of each breast in someone of any gender. Nipples can stand erect when stimulated by touch or cold. The nipples can also release milk in people who are breastfeeding.
    • Nocturnal emission
      • Commonly known as a “wet dream;” ejaculation while sleeping, which most often occurs during puberty.
    • Nocturnal orgasm
      • A sexual climax during sleep.
    • Nocturnal penile tumescence (NPT)
      • Spontaneous erection of the penis during sleep. NPT usually happens several times per night as part of the sleep cycle.
    • Non-op / non-operative
      • Trans people who haven’t had, and may not desire, gender affirming surgery. Does not imply anything about hormone treatment.
    • Nonoxynol-9
      • A chemical that immobilizes sperm. Used in spermicide.
    • Norgestrel
      • A kind of progestin used in some hormonal contraceptives.
    • Norplant
      • A method of birth control that’s no longer available in the U.S. Norplant consisted of six small, soft capsules containing hormones. Norplant was inserted under the skin of the upper arm.
    • NPT (nocturnal penile tumescence)
      • Spontaneous erection of the penis during sleep. NPT usually happens several times per night as part of the sleep cycle.
    • Nuchal translucency test
      • A test for Down syndrome and other conditions using ultrasound to measure the fold of skin on the neck of a fetus.
    • Nulliparous
      • Never having given birth.
    • Nurse practitioner
      • A registered nurse who has been trained to provide primary health care, including many services also performed by doctors.
    • Nurse-midwife
      • A registered nurse who has been trained to facilitate childbirth.
    • NuvaRing
      • The brand name of the hormonal birth control ring available in the U.S. The NuvaRing is placed inside the vagina, and needs to be replaced each month.
  • O
    • Obamacare
      • A nickname for the Patient Protection and Affordable Care Act, a law signed by President Barack Obama in 2010 that set in motion sweeping changes to the U.S. health care system, including the requirement that private health insurance companies cover people with pre-existing conditions, copay-free preventive care including birth control, and a requirement that young people can stay on their parent or guardian’s insurance until they’re 26 years old. The law is frequently called ACA, for short.
    • Obscenity
      • Sexually arousing imagery that’s deemed offensive to the public.
    • Obstetrician
      • A doctor who’s specially trained to provide care during pregnancy and childbirth.
    • One-night stand
      • Slang for having sex with someone right after meeting them and never seeing them again.
    • Oocyte
      • A not fully developed egg cell.
    • Oophorectomy
      • The surgical removal of an ovary.
    • Open enrollment
      • A period of time each year when people can enroll in certain health care plans. Each year, consumers can select plans offered by their employer or buy insurance on the health insurance marketplaces (either the federal marketplace, Healthcare.gov, or the state-based marketplaces).
    • Open relationship / open marriage
      • When 2 people in an intimate relationship or marriage agree that they can have other sexual or romantic partners. See: polyamory.
    • Oral contraceptive
      • Another name for the birth control pill.
    • Oral herpes
      • An infection of the mouth with herpes simplex virus 1 or herpes simplex virus 2. Symptoms are commonly known as cold sores.
    • Oral sex
      • Sex involving the mouth and genitals, including cunnilingus, anilingus, and fellatio.
    • Orchiectomy
      • Surgical removal of 1 or both testicles.
    • Orchitis
      • Inflammation of a testicle.
    • Orgasm
      • The peak of sexual arousal, when all the muscles that were tightened during sexual arousal relax, usually causing a very pleasurable feeling.
    • Orgy
      • Sex among 3 or more people.
    • Out
      • Short for “out of the closet.” Being open about your sexual orientation or gender identity.
    • Out-of-network
      • Describes a health care provider (like a doctor or nurse) or service that’s not covered by your insurance plan. You may still be able to visit the provider or access the services, but it will cost more than an in-network provider.
    • Outer lips
      • The labia that surround the inner lips of the vulva. Also called the "labia majora."
    • Outercourse
      • Sexual activity that doesn’t include vaginal or anal sex.
    • Outing
      • Revealing someone else’s sexual orientation or gender identity that they may not have shared or want to be shared.
    • Ovarian cyst
      • A growth on an ovary. Usually benign (not cancerous). May cause belly pain or irregular periods, and sometimes requires treatment. Most often goes away on its own.
    • Ovaries
      • The 2 organs that store and release eggs. Ovaries also produce hormones, including estrogen, progesterone, and testosterone.
    • Over-the-counter
      • Available without a prescription from a nurse or doctor.
    • Oviduct
      • Also known as the fallopian tube, it carries an egg from the ovary to the uterus.
    • Ovulation
      • When an ovary releases an egg.
  • P
    • Pansexual
      • Having sexual or romantic attraction to people of all genders.
    • Pap smear
      • A term commonly used to describe a Pap test, which looks for abnormal, precancerous, or cancerous growths on the cervix.
    • Pap test
      • A test to look for abnormal, precancerous, or cancerous growths on the cervix. Sometimes called a Pap smear.
    • Paragard
      • A brand of IUD that contains copper and can prevent pregnancy for up to 12 years.
    • Paraphilia
      • A sex practice that a person needs for sexual arousal, but isn’t considered socially normal or acceptable.
    • Parental consent
      • A requirement that 1 or both parents give permission for a minor (someone under the age of 18) to do something. Many states have mandatory parental consent laws regarding abortion services for minors. Most states don’t require parental consent for services like birth control or STD testing.
    • Parous
      • Having given birth.
    • Parturition
      • Childbirth.
    • Passing
      • Being perceived as the gender with which one identifies, regardless of sex assignment at birth. Can also refer to someone being assumed to be cisgender, or being assumed to be heterosexual. Many trans people object to the term “passing” because it suggests that someone is not genuinely what they are passing as.
    • Pearl necklace
      • Slang for ejaculate (cum) spilled onto a person’s neck or chest.
    • Pearly pink papules / pearly penile papules
      • Tiny flesh-colored bumps that ring the edge of the head of the penis. 1 in 3 people with penises have papules. Although they may be sensitive to touch, they’re not harmful and aren’t sexually transmitted. They can be removed with laser treatment.
    • Pelvic exam
      • A physical exam of the vulva, vagina, cervix, uterus, and ovaries. May include a Pap or HPV test, but not always.
    • Pelvic inflammatory disease (PID)
      • An infection in the uterus, fallopian tubes, and/or ovaries that can lead to infertility, ectopic pregnancy, and chronic pain. It’s often caused by untreated STDs like gonorrhea and chlamydia.
    • Pelvic tuberculosis
      • A very rare, chronic infection of the fallopian tubes, ovaries, vagina, or vulva resulting from systemic tuberculosis. Can cause infertility.
    • Penis
      • A reproductive and sex organ that’s made of spongy tissue. The spongy tissue fills with blood during sexual excitement, a process known as erection (getting hard). Urine and semen pass through the penis.
    • PEP (post-exposure prophylaxis)
      • Medicine that helps prevent HIV (or other infections) if started within a few days after being exposed.
    • Perfect use
      • How effective a birth control method would be if always used exactly the right way. See "typical use."
    • Performance anxiety
      • Fear of being unable to please a sex partner.
    • Perimenopause
      • The period of time leading up to menopause during which some symptoms of menopause may start.
    • Perinatal
      • Around the time of childbirth.
    • Perineum
      • The area of skin between the anus and the vulva or scrotum.
    • Period
      • Menstruation. The monthly flow of blood and tissue from the uterus and out the vagina.
    • Petting
      • Old fashioned slang for outercourse.
    • Peyronie’s disease
      • A rare condition that’s caused by fibrous growths or scar tissue inside the penis. Symptoms including a severe curve to the penis and painful erections.
    • Phallic
      • Shaped like a penis.
    • Phallophobia
      • Fear of the penis.
    • Phalloplasty
      • In genital reconstructive surgery, the creation of a penis from the person’s existing genital tissue.
    • Pheromones
      • Odors given off by animals, including humans, to attract others sexually.
    • Phimosis
      • A condition in which the foreskin of the penis is too tight to be pulled back, usually diagnosed in young children.
    • Phone sex
      • Sexually arousing phone conversations in which people fantasize about having sex with each other and masturbate.
    • Physician assistant
      • A health care provider who’s trained to provide basic medical services, usually under the supervision of a physician.
    • PID (pelvic inflammatory disease)
      • An infection in the uterus, fallopian tubes, and/or ovaries that can lead to infertility, ectopic pregnancy, and chronic pain. It’s often caused by untreated STDs like gonorrhea and chlamydia.
    • Pill, the
      • Short for the birth control pill.
    • Pimp
      • The abusive, exploitive “manager” of a sex worker.
    • Pitching a tent
      • Slang for having an erection. It comes from the way pants or bed sheets look when the erect penis, like a tent pole, pushes them up and out.
    • Pituitary gland
      • The organ that makes hormones that regulate growth and development, including puberty and sexual maturation. Located underneath the brain.
    • Placenta
      • The organ formed on the wall of the uterus that provides oxygen and other nourishment to a fetus during pregnancy, and through which waste products are eliminated from a fetus.
    • Plan B
      • A brand of emergency contraception pill made from levonorgestrel, the same kind of hormone found in birth control pills. Available over the counter to anyone of any age or gender in the US.
    • Plateau
      • The stage of sexual arousal in which a sexually excited person may approach orgasm. The third stage of the sexual response cycle.
    • Platonic
      • Not sexual.
    • PMS (premenstrual syndrome)
      • Emotional and physical symptoms that appear a few days before and during menstruation, including depression, fatigue, bloating, and irritability.
    • Point of no return
      • The moment during sexual excitement when a person with a penis can’t stop their ejaculation. It occurs when the prostate begins to contract and pulse out seminal fluid. Also known as ejaculatory inevitability.
    • Polyamory
      • Having sexual or romantic relationships with more than 1 person at a time with the consent of all people involved.
    • Polycystic ovary syndrome (PCOS)
      • A hormone imbalance where the ovaries release too much androgen (a hormone). Common symptoms include missed or irregular periods, benign ovarian cysts, infertility, acne, excessive hair growth, and weight gain.
    • Polygamy
      • Having more than 1 spouse.
    • Polyps
      • Small, usually harmless growths that are common in many parts of the body, including the uterus and cervix.
    • Pornography (porn)
      • Video, photos or words that are made for sexual excitement.
    • Positive result
      • A test finding that indicates that the condition tested for is present.
    • Post-exposure prophylaxis (PEP)
      • Medicine that helps prevent HIV (or other infections) if started within a few days after being exposed.
    • Post-ovulation method
      • A fertility awareness-based method of birth control using abstinence or barrier methods from the beginning of menstruation until the morning of the fourth day after predicted ovulation — more than half of the menstrual cycle.
    • Postpartum
      • Following childbirth.
    • Postpartum depression
      • Depression that happens after giving birth.
    • Postpartum psychosis
      • Severe postpartum depression that may include withdrawal from reality, delusions, and hallucinations.
    • Pre-cum
      • Slang for pre-ejaculate, ­the liquid that oozes out of the penis during sexual excitement before ejaculation. Sometimes, for some people, it has a small amount of sperm in it.
    • Pre-eclampsia
      • An condition during pregnancy that includes fluid buildup, high blood pressure, and protein deposits in the urine of a pregnant person. The complications may include brain hemorrhage, eye damage, heart problems, fetal malnutrition, low birth weight, and death.
    • Pre-ejaculate
      • The liquid that oozes out of the penis during sexual excitement before ejaculation. Sometimes, for some people, it has a small amount of sperm in it. Also called “pre-cum.”
    • Pre-embryo
      • The organism that starts developing at fertilization when the zygote is formed by the joining of an egg and a sperm. It attaches to the lining of the uterus after about 7 days. It continues to develop until it forms an embryo, 9 to 11 days later. Up to 50 percent of all pre-embryos end up passing out of the uterus without ever becoming an embryo.
    • Pre-exposure prophylaxis (PrEP)
      • A medicine taken daily to reduce the risk of getting HIV.
    • Pregnancy
      • When someone is carrying a developing fetus in their uterus. It begins with the implantation of the pre-embryo and progresses through the embryonic and fetal stages until birth, unless it’s ended by miscarriage or abortion. It lasts about 40 weeks from implantation to birth.
    • Premarital sex
      • Sex between people who aren’t married.
    • Premature delivery
      • Early childbirth, before the 37th week of pregnancy.
    • Premature ejaculation
      • When a person with a penis ejaculates before they want to, or has little control over how quickly they ejaculate during sex.
    • Premenstrual dysphoric disorder (PMDD)
      • A severe form of premenstrual syndrome (PMS) that causes depression and anxiety during the luteal phase of the menstrual cycle (after ovulation).
    • Premenstrual syndrome (PMS)
      • Emotional and physical symptoms that appear a few days before and during menstruation, including depression, fatigue, bloating, and irritability.
    • Premium (health insurance premium)
      • The amount of money an individual pays each month for health insurance.
    • Prenatal vitamin
      • Vitamins made specifically to support a healthy pregnancy. The most important prenatal vitamins are folic acid and iron.
    • PrEP (pre-exposure prophylaxis)
      • A medicine taken daily to reduce the risk of getting HIV.
    • Prepuce
      • Foreskin.
    • Priapism
      • An unwanted and long-lasting erection. Caused by too much blood flow into the corpus cavernosa, often from medications.
    • Primary sex characteristics
      • Body parts that are related to reproduction or sexual functioning (like the penis, scrotum, vulva, vagina, uterus, and ovaries). It also includes the ability to produce eggs or sperm.
    • Primary syphilis
      • The first stage of a syphilis infection, during which an open sore called a chancre develops.
    • Pro-choice
      • Supporting the right to a safe, legal abortion.
    • Procreative sex
      • Having vaginal sex for the purpose of having a child.
    • Progesterone
      • A hormone produced in the ovaries that helps regulate puberty, menstruation, and pregnancy.
    • Progestin
      • A synthetic progesterone found in all hormonal birth control methods.
    • Prolapsed uterus
      • A condition in which the uterus sags or slips out of its normal position into the vagina. Caused by weakened pelvic muscles. Most common after menopause in people who have given birth.
    • Promiscuous
      • Having casual sex frequently with different people.
    • Prophylactic
      • A device or treatment used to prevent infection, like a condom.
    • Prostate
      • A gland that produces a fluid which helps sperm move. The prostate can be very sensitive to the touch, and many people enjoy stimulating the prostate for sexual pleasure.
    • Prostatitis
      • An enlargement and inflammation of the prostate gland that can cause problems peeing and pain in the groin. Sometimes goes away on its own, and sometimes antibiotics or other medications can treat it.
    • Prostitute
      • Someone who gets paid to provide sex. Often considered offensive and outdated. The preferred term is “sex worker.”
    • Prostitution
      • The act of providing sex for pay. Often considered offensive and outdated. The preferred term is “sex work.”
    • Puberty
      • The time between childhood and adulthood when people mature physically and sexually. Puberty is marked by changes such as breast development and menstruation or hair growth and ejaculation.
    • Pubic hair
      • Hair that grows around the sex organs. Pubic hair is a secondary sex characteristic that appears during puberty.
    • Pubic lice
      • Tiny insects that can be sexually transmitted. They live in pubic hair and cause intense itching in the genitals.
    • Pulling out / pull-out method
      • Pulling the penis out of the vagina before ejaculation in order to avoid pregnancy. Also called “withdrawal.”
  • Q
    • Queef
      • The sound made when air is released from the vagina. Air is often pushed into the vagina during vaginal sex or penetration with tampons, fingers, or sex toys.
    • Queer
      • A word that can refer to a variety of sexual identities and gender identities that are anything other than straight and cisgender. In the past queer was used as a slur, and may still be offensive to some. However, many people use the word with pride to identify themselves.
    • Questioning
      • Being unsure about your sexual orientation or gender identity.
    • Quickening
      • The moment during pregnancy when a pregnant person first notices the fetus moving in their uterus.
  • R
    • Rape
      • Sexual intercourse without consent.
    • Rectovaginal exam
      • A physical exam of the reproductive organs and the tissues that separate the vagina and rectum.
    • Rectum
      • The lowest end of the intestine before the anus, where solid waste (feces) is stored.
    • Refractory period
      • The brief time after ejaculation during which getting another erection is impossible.
    • Reproductive cell
      • Unique cells — egg and sperm — that can join to make reproduction possible.
    • Reproductive organs
      • The fallopian tubes, ovaries, uterus, vagina, penis, and testes. Organs that relate to reproduction.
    • Resolution
      • The period after orgasm in which the body returns to a non-stimulated state.
    • Retrograde ejaculation
      • When ejaculate goes into the bladder instead of out the urethra/penis.
    • Rh factor
      • The presence of certain proteins on the surface of red blood cells. People with Rh factor are “Rh positive,” and people without it are “Rh negative.” Commonly known as a positive or negative blood type. Pregnant people and their fetuses may be tested for Rh factor, because if the pregnant person is negative and the fetus is positive, it can be dangerous.
    • Rhythm method
      • Also known as the calendar method; a fertility awareness-based method of birth control.
    • Right-to-life
      • An expression that people who oppose safe and legal abortion use to describe their position.
    • Roe v. Wade
      • The 1973 U.S. Supreme Court decision that legalized abortion nationwide.
    • Role-play
      • Acting out a sexual fantasy with a partner.
    • Romantic attraction
      • A desire for an intimate (but not necessarily sexual) connection with another person.
    • RU-486
      • The laboratory research code number that was used during clinical trials for a medication to cause abortion. (Outdated and inaccurate. Correct term is mifepristone.)
  • S
    • S&M (sadomasochism)
      • The consensual use of domination and/or pain for sexual stimulation in sex. The “sadist” dominates/inflicts pain. The “masochist” is submissive/receives pain.
    • Sadomasochism (S&M)
      • The consensual use of domination and/or pain for sexual stimulation in sex. The “sadist” dominates/inflicts pain. The “masochist” is submissive/receives pain.
    • Safe word
      • A previously agreed upon word or phrase that means a partner is no longer enjoying an activity during sex and it must stop.
    • Safer sex
      • Ways in which people reduce the risk of getting sexually transmitted infections, including HIV. A more precise term than “safe sex,” because no sex act is completely safe from the possibility of passing a sexually transmitted infection.
    • Sanitary pad
      • An absorbent reusable or disposable lining made of cotton or similar fibers that’s worn against the vulva to absorb menstrual flow.
    • Scabies
      • An itchy skin condition caused by tiny parasites. It's passed through skin-to-skin contact, usually during sex. Scabies isn't dangerous and can be cured.
    • Scrotum
      • A sac of skin, divided into 2 parts, that holds the testicles.
    • Second trimester
      • The second 3 months of pregnancy.
    • Secondary sex characteristics
      • Features of the body that are caused by hormones. They develop during puberty, or can be brought on by hormone replacement therapy (HRT). For people with vaginas, these include breast development and widened hips. For people with penises, they include facial hair development and voice deepening. And everyone develops pubic hair and underarm hair.
    • Secondary syphilis
      • The second stage of the infection, during which a rash and fever develop.
    • Self-esteem
      • Feeling worthwhile.
    • Semen
      • Fluid containing sperm that’s ejaculated from the penis during orgasm. Semen is composed of fluid from the seminal vesicles, fluid from the prostate, and sperm from the testes.
    • Seminal fluid
      • A liquid that nourishes and helps sperm to move. Made in the seminal vesicles.
    • Seminal vesicle
      • One of 2 small organs located beneath the bladder and connected to the urethra that produce seminal fluid.
    • Seminiferous tubules
      • A network of tiny tubules in the testes that produce sperm and the androgens (a kind of hormone).
    • Septic abortion
      • An abortion or miscarriage that leads to infection. Usually associated with illegal and unsafe abortion, aggressive medical treatment is often required to save the life of the patient.
    • Sex
      • A label assigned at birth of female, male, or sometimes intersex. Also, the act of vaginal, anal, or manual (using hands) intercourse, or oral-genital stimulation, with a partner.
    • Sex addiction
      • A compulsion to have frequent sex that gets in the way of daily life, such as work, school, and spending time with family and friends.
    • Sex assignment
      • The designation of biological sex — female, male, or intersex — usually made by a doctor at the birth of a child. The sex that appears on a person’s birth certificate.
    • Sex cell
      • A reproductive cell - egg or sperm.
    • Sex change operation
      • Outdated and offensive term for “gender affirming surgery.”
    • Sex chromosomes
      • The cell structures that carry hereditary information that typically differentiate female from male in humans and other mammals. XX chromosomes are typically associated with females. XY chromosomes are typically associated with males.
    • Sex drive
      • The urge and desire to have sex. Also called libido.
    • Sex flush
      • The temporary reddening or darkening of the skin that may happen from sexual arousal during the plateau stage of the sexual response cycle. It may occur on the belly, breasts/chest, face, hands, and soles of the feet.
    • Sex selection
      • The attempt to control the sex of your future children.
    • Sex therapy
      • Treatment to resolve a sexual problem or dysfunction, such as premature ejaculation, inability to have orgasm, or a low level of sexual desire.
    • Sex worker
      • A person who’s paid for providing sex or sexually arousing activities, including phone or camera sex, erotic massage, lap dancing, or striptease.
    • Sex-negative
      • Believing that sex and sexuality are bad or dangerous.
    • Sex-positive
      • Accepting sex and sexuality as a natural, good part of life.
    • Sexism
      • Systemic and individual discrimination against women.
    • Sexology
      • The scientific study of sex and sexuality through many disciplines including, but not limited to, anthropology, biology, history, law, medicine, psychology, and sociology.
    • Sexophobia
      • Fear of sex/sexuality.
    • Sexting
      • Sending sexual text messages or images.
    • Sexual abuse
      • Sexual activity that’s harmful, exploitative, or not consensual.
    • Sexual arousal
      • Erotic excitement.
    • Sexual assault
      • The use of force or coercion, physical or psychological, to make a person engage in sexual activity.
    • Sexual dysfunction
      • A psychological or physical disorder that affects sexual anatomy, behavior, health, or well-being.
    • Sexual harassment
      • Unwanted sexual advances from someone. Includes suggestive gestures, language, or touching.
    • Sexual health
      • Enjoying emotional, physical, and social well-being in regard to one’s sexuality, including free and responsible sexual expression that enriches one’s life. (Sexual health is not only the absence of sexual dysfunction or disease.)
    • Sexual identity
      • Your understanding of your own sex, gender identity, sexual orientation, and sexual expression/preferences.
    • Sexual intercourse
      • Usually, sex that includes penetration of the vagina with a penis. Can also describe penetration of the anus with a penis.
    • Sexual minority
      • An individual or group whose gender identity, sexual behavior, sexual orientation, or sexual preference is thought to be outside socially accepted norms. Generally any group/identity that is outside of heterosexual, cisgender, or monogamous.
    • Sexual norms
      • Social standards based on a society’s attitudes, customs, and expectations regarding sex and sexuality. In other words, things that are considered sexually “normal.”
    • Sexual orientation
      • Identities that describe what gender(s) a person is romantically and/or sexually attracted to. There are many sexual orientations. Some common sexual orientations include gay, lesbian, straight, and bisexual.
    • Sexual preference
      • People, activities, or other things that you like, sexually.
    • Sexual response cycle
      • A long researched and commonly used framework of human response to sexual stimulation, originally mapped by Masters & Johnson. The 5 stages of the cycle are desire, excitement, plateau, orgasm, and resolution.
    • Sexual revolution
      • Used to describe 2 different historic shifts in the sexual attitudes and norms of people in the U.S. The first American sexual revolution occurred in the aftermath of World War I — “the roaring '20s.” It was characterized by younger women — “flappers” — openly insisting on the right to have sex before marriage. The second American sexual revolution occurred during the 1960s and '70s. It was accompanied by the women’s & gay liberation movements, which were entwined with the civil rights movement.
    • Sexuality
      • Sex, gender identity, sexual orientation, sexual preference, and the way these things interact with emotional, physical, social, and spiritual life. Sexuality is shaped by your family and the social norms of your community.
    • Sexually transmitted disease (STD)
      • Infections that are passed from one person to another during vaginal, anal, or oral sex, or sexual skin-to-skin contact. More accurately called sexually transmitted infection.
    • Sexually transmitted infection (STI)
      • Infections that are passed from one person to another during vaginal, anal, or oral sex, or sexual skin-to-skin contact. Commonly known as sexually transmitted disease.
    • Shaft
      • A structure of erectile tissue and nerves that’s shaped like a column and forms the body of the penis and clitoris.
    • Sheer glyde dam
      • A thin, square piece of latex that helps prevent STDs from being passed during oral sex on a vulva or anus.
    • Sixty-nine / 69
      • Simultaneous, mutual oral sex.
    • Skene’s glands
      • 2 glands on either side of the opening to the urethra that release fluid during female ejaculation. Also called paraurethral glands or female prostate glands.
    • Slut
      • An insulting term for a woman who has “too many” sex partners, though different people have different ideas about what is considered too many. Some people have reclaimed the term “slut” and use it to describe themselves as people who are proud of their sexual freedom.
    • Smegma
      • A sticky, white, unpleasant-smelling substance produced under the foreskin at the glans of the penis and clitoris. It’s formed by dead skin cells, oils, and genital fluid secretions/sweat.
    • Sodomy
      • An outdated term for oral sex, anal sex, or other genital contact that isn’t vaginal sex.
    • Sonogram
      • An image produced by an ultrasound that shows the inside of the body. Used to view the fetus during pregnancy.
    • Speculum
      • A plastic or metal instrument used to separate the walls of the vagina so a doctor or nurse can examine the vagina and cervix.
    • Sperm
      • A reproductive cell that combines with an egg to cause a pregnancy. Made in the testes.
    • Spermarche
      • When sperm is first produced by the testes.
    • Spermatogenesis
      • The process of producing sperm. Occurs in the testes.
    • Spermicides
      • Chemical birth control that immobilizes sperm to prevent pregnancy. Found on some condoms, and also in birth control sponges, foams, creams, films, suppositories, and gels.
    • Spina bifida
      • A birth defect that exposes the spinal cord, causing severe disorders of the nervous system. Taking folic acid before and during pregnancy can help prevent it.
    • Spontaneous abortion
      • Miscarriage, pregnancy loss.
    • Spontaneous erection
      • The hardening of the penis without sexual stimulus. Common during puberty.
    • Spotting
      • Light bleeding that happens not during a menstrual period.
    • Spouse
      • A partner in marriage.
    • Squirting
      • Ejaculation from people with vulvas, sometimes called “female ejaculation.” The fluid comes from the Skene’s glands, which are located in the vulva near the opening of the urethra. Squirting happens in about 1 out of 10 women.
    • Stalking
      • Following or tracking someone in person or online without their consent.
    • Standard days method
      • A kind of fertility awareness-based method of birth control. The standard days method works by tracking fertility using a calendar, an app, or a string of beads called CycleBeads.
    • Statutory rape
      • Legally, sexual contact between an adult and anyone who is below the age of consent, whether or not the contact is voluntary.
    • STD (sexually transmitted disease)
      • An infection that’s passed from one person to another during vaginal, anal, or oral sex, or sexual skin-to-skin contact. More accurately called sexually transmitted infection.
    • Stealthing
      • When a condom is removed during sex without the other person’s knowledge or consent.
    • Stereotype
      • A widely accepted judgment or bias regarding a person or group.
    • Sterility
      • Infertility — the inability to become pregnant or to cause a pregnancy.
    • Sterilization
      • Surgical methods of birth control that are intended to be permanent — blocking of the fallopian tubes for women or the vas deferens for men.
    • STI (sexually transmitted infection)
      • An Infection that’s passed from one person to another during vaginal, anal, or oral sex, or sexual skin-to-skin contact. Commonly known as sexually transmitted disease.
    • Stigma
      • Severe disapproval/judgment for a behavior that’s reinforced by society/culture.
    • Straight
      • Being attracted to people of the other gender. Heterosexual.
    • Stranger rape
      • Forced sex by someone unknown to the victim. Extremely rare.
    • Strap-on
      • A dildo that can be attached to a person to use for vaginal, anal, or oral sex.
    • Swinging
      • When couples switch partners for sex.
    • Swyer syndrome
      • An intersex condition in which a person doesn’t have fully developed gonads (ovaries or testes). People with Swyer syndrome typically have vulvas but need hormone therapy to start puberty. They may also need surgery to remove the tissue where ovaries typically are to prevent cancer.
    • Syphilis
      • A bacterial sexually transmitted infection that is easily cured with antibiotics, but can cause permanent damage if left untreated.
  • T
    • Taboo
      • A behavior that’s outside the cultural norms. Something society or culture says you shouldn’t do or talk about.
    • Tampon
      • A firm, disposable roll of absorbent cotton or other fiber that goes inside the vagina to absorb menstrual blood.
    • Temperature method
      • A fertility awareness-based method for predicting fertility. It involves charting when ovulation occurs by tracking basal body temperature changes every morning before getting out of bed. Can be used for birth control or for planning pregnancy.
    • Tenting
      • The lifting of the uterus during sexual excitement, which creates more space in the vagina.
    • Tertiary syphilis
      • The third phase of the infection during which organ damage and failure occur.
    • Testes
      • Two ball-like glands inside the scrotum that produce hormones, including testosterone. Each testis also encloses several hundred small lobes, which contain the tiny, threadlike seminiferous tubules that produce sperm. Also called "testicles."
    • Testicles
      • Two ball-like glands inside the scrotum that produce hormones, including testosterone. Each testicle also encloses several hundred small lobes, which contain the tiny, threadlike seminiferous tubules that produce sperm. Also called "testes."
    • Testosterone
      • An androgen hormone produced in the testes and in smaller amounts in the ovaries. Generally associated with masculine secondary sex characteristics. Can be taken synthetically as gender affirming treatment for trans men.
    • Thelarche
      • The time during puberty when breasts begin to develop.
    • Therapeutic abortion
      • Ending a pregnancy because of a fetal abnormality or to protect the pregnant person’s physical or mental health or life.
    • Third trimester
      • The last 3 months of pregnancy.
    • Threatened miscarriage
      • A condition in which a pregnant person bleeds, with or without mild cramps, but the cervix hasn’t begun to open. Half of threatened miscarriages end in pregnancy loss. In the other half, the bleeding stops, and the pregnancy goes on normally.
    • Thrush
      • A yeast infection in the mouth or throat. Caused by an overgrowth of a yeast that lives naturally in the body, called candida albicans.
    • Tocophobia
      • Fear of childbirth.
    • Top surgery
      • Surgical reconstruction to create a more female- or more male-appearing chest. Top surgery may involve breast reduction or breast implants.
    • Toxic shock syndrome
      • A rare but very dangerous overgrowth of bacteria in the vagina. Symptoms include vomiting, high fever, diarrhea, and a sunburn-type rash. A possible result of leaving an object (including tampons and birth control sponges) in the vagina for too long.
    • Trans
      • Short for transgender. A general term used to describe someone whose gender expression/gender identity are different than the sex they were assigned at birth. Some people put an asterisk on the end of trans* to expand the word to include all people with non-conforming gender identities and expressions.
    • Transgender
      • A general term used to describe someone whose gender expression/gender identity are different than the sex they were assigned at birth.
    • Transgender man (trans man, female-to-male, FTM, F2M)
      • A person whose sex assignment at birth was female but whose gender identity is male. Can also refer to someone who was surgically assigned female at birth, in the case of intersex people, but whose gender identity is male. Many trans men identify simply as men.
    • Transgender woman (trans woman, male-to-female, MTF, M2F)
      • A person whose sex assignment at birth was male but whose gender identity is female. Can also refer to someone who was surgically assigned male at birth, in the case of intersex people, but whose gender identity is female. Many trans women identify simply as women.
    • Transition
      • The process of a person changing to present as the gender they identify as. Transitioning means different things to different people. It may involve any of the following: coming out to one’s family, changing the pronouns and words used to describe one’s gender, dressing differently, changing one’s name, or beginning gender affirming health care.
    • Transphobia
      • Fear and hatred of people who are, or are perceived to be, trans-identified or gender non-conforming.
    • Transsexual
      • An outdated and often offensive term for someone whose gender identity doesn’t match the sex assigned at birth, and who desire and/or seek to transition to bring their body into alignment with their gender identity. Some people find this term offensive, others do not. Only refer to someone as transsexual if they tell you that’s how they identify.
    • Transvestite
      • An outdated term for a cross-dresser. Considered offensive by many.
    • Tribadism
      • Sex that involves 2 people rubbing their vulvas/clitorises together.
    • Trimester
      • One-third of the 9 months of pregnancy.
    • Triphasic combination pill
      • A type of birth control pill that has 3 different doses of estrogen and progestin during a 28-day cycle. Typically each week has a new dose for 3 weeks, followed by a week of placebo (no hormones).
    • Triple screen / triple test
      • A prenatal blood test that’s given at around 16 weeks of pregnancy to detect Down syndrome, brain and spine defects, and other conditions. (Further tests will be offered if this blood test reveals an increased risk of birth defects.) Also called “multiple marker screening.”
    • Tubal ligation
      • Surgical blocking of the fallopian tubes by tying them off. A form of sterilization - permanent birth control.
    • Tubal pregnancy
      • An ectopic pregnancy in the fallopian tube. Can be very dangerous, requiring medical treatment.
    • Tubal sterilization
      • Surgical blocking of the fallopian tubes for permanent birth control.
    • Tubectomy
      • The surgical removal of a fallopian tube.
    • Tumescence
      • Erection and enlargement of the sex organs, especially the clitoris and penis, during sexual arousal.
    • Turner syndrome
      • A rare intersex condition in which someone is born with one X chromosome (X_ instead of XX or XY). While most people with turner syndrome have a fully formed vulva, they typically have underdeveloped reproductive organs, leading to infertility.
    • Two-day method
      • A fertility-awareness based method of birth control in which a person observes whether or not they’ve secreted cervical mucus 2 days in a row.
    • Two-spirit
      • An umbrella term for gender identities common in American Indian/First Nations/Native American cultures. Refers to people who have both masculine and feminine parts of their identity, and are treated as a third gender within those cultures.
    • Typical use
      • The effectiveness of a particular birth control method in the population, taking into account when people don’t always use their method consistently or correctly. Since this looks at real world use, it’s a more accurate way to describe how many people get pregnant using a method.
    • Tyson’s glands
      • The organs that secrete a fluid that combines with bacteria and body oils to form smegma. Several are located under the foreskin and clitoral hood. Others are located under the corona of the glans of the penis and on either side of the frenulum. Also called preputial glands.
  • U
    • Ultrasound
      • A medical test that creates an image of internal organs by bouncing sound waves off the internal organs. Frequently used to find or monitor a pregnancy, but has a variety of medical uses.
    • Uncircumcised
      • When the foreskin hasn’t been removed from the penis.
    • Undescended testicle
      • A testicle that doesn’t hang away from the body but remains in the abdomen. In about 5 out of 100 assigned-male births, 1 or both of the testicles don’t descend.
    • Ureters
      • The 2 tubes that carry urine from the kidneys to the bladder.
    • Urethra
      • A tube that empties the bladder and carries urine to the urethral opening (the hole you pee out of). The urethra also carries ejaculate and pre-ejaculate in people with penises.
    • Urinary tract infection (UTI)
      • A bacterial infection of the bladder, the ureters, or the urethra. It is not sexually transmitted. The most common symptom is a frequent urge to pee and pain while peeing. Curable with antibiotics.
    • Uterine perforation
      • When a doctor or nurse accidentally punctures the wall of the uterus with a surgical instrument during a procedure or with an IUD during insertion.
    • Uterus
      • The pear-shaped, reproductive organ from which people menstruate and where a pregnancy develops. Also called “womb.”
    • UTI (urinary tract infection)
      • A bacterial infection of the bladder, the ureters, or the urethra. It is not sexually transmitted. The most common symptom is a frequent urge to pee and pain while peeing. Curable with antibiotics.
  • V
    • Vacuum aspiration abortion
      • A surgical procedure in which a pregnancy is removed from the uterus with a gentle suction device.
    • Vagina
      • The stretchy passage that connects the vulva with the cervix and uterus. It’s where menstruation comes out of the body, a baby comes out of the body through childbirth, and/or one place sexual penetration (by a penis, finger, sex toy, etc.) can happen. During menstruation, it’s where tampons or menstrual cups are placed.
    • Vaginal atrophy
      • Thinning and irritation of the folds of the walls of the vagina. Caused by low estrogen production, which happens during perimenopause and menopause.
    • Vaginal contraceptive film / vcf
      • An over-the-counter, reversible barrier method of birth control. A thin, small, square sheet of spermicide that goes into the vagina, and melts into a thick liquid that blocks the entrance to the uterus. It stops sperm from moving and prevents it from joining with an egg. Most effective when used with a condom.
    • Vaginal dilators
      • A series of increasingly wider plastic cylinders that are used to enlarge the vagina or to treat vaginismus by helping to increase capacity for vaginal penetration.
    • Vaginal lubrication
      • When the vagina gets wetter and more slippery, which makes it easier for things to go inside it. This happens naturally with vaginal secretions, and can be done with synthetic lube. Sometimes happens during sexual arousal, but not always.
    • Vaginal orgasm
      • The climax or peak of sexual arousal that’s brought about by stimulating the vagina without stimulating the clitoris.
    • Vaginal sex
      • Sex in which a penis enters a vagina. Also called “vaginal intercourse” or “penis-in-vagina sex.”
    • Vaginismus
      • Painful muscle spasms in the vagina as a response to pressure/contact. Sometimes has no known cause, and sometimes happens after psychological or physical trauma.
    • Vaginitis
      • An irritation of the vagina or vulva.
    • Vaginoplasty
      • The surgical creation of a vagina.
    • Varicocele
      • An enlargement of one or more of the veins in the scrotum. It can cause lower sperm motility and infertility, but doesn’t always. Sometimes treatment is needed, and sometimes it doesn’t cause any symptoms or problems so treatment is not needed.
    • Vas deferens
      • A long, narrow tube that carries sperm from each epididymis to the seminal vesicles during ejaculation. This is the tube that’s cut for a vasectomy, stopping sperm from leaving the body.
    • Vasectomy
      • Surgical blocking of the vasa deferentia (each vas deferens) for permanent birth control.
    • Vasocongestion
      • An increase in the amount of blood, which leads to swelling, in certain body tissues (breasts, clitoris, inner labia, nipples, penis) that happens during sexual arousal. Also causes lubrication of the vagina.
    • Viability
      • The ability of a fetus to survive outside the uterus.
    • Vibrator
      • An electrically powered sex toy that applies vibrations to parts of the body for sexual pleasure.
    • Virginity
      • Having never had sex. May mean different things to different people. For example, many people think you “lose your virginity” when you have vaginal sex. Others think that you lose your virginity if you have other kinds of sexual activity, like oral sex or anal sex.
    • Vocal surgery
      • Surgery to change the pitch of a person’s voice, often to create a more feminine sounding voice for trans women.
    • Voyeurism
      • Sexual practice that involves watching another person undress or engage in sexual behavior.
    • Vulva
      • The external sex organs that include the clitoris, labia (majora and minora), opening to the vagina (introitus), opening to the urethra, and two Bartholin’s glands.
  • W
    • Wet dreams
      • Erotic dreams that can lead to ejaculation or vaginal lubrication. Common during puberty. See "nocturnal emission."
    • Withdrawal
      • Pulling the penis out of the vagina before ejaculation in order to avoid pregnancy. Also called “pulling out” or the “pull-out method.”
  • X
    • Xe (xe, xem, xyr, xyrs, xemself)
      • A gender-neutral pronoun (or set of pronouns) some people use for themselves to replace “he,” “she,” or “they.”
    • Xx chromosomes
      • The pair of sex-differentiating chromosomes that leads to someone being born with a vagina, vulva, uterus, and ovaries. Babies with xx chromosomes are usually assigned female at birth.
    • Xy chromosomes
      • The pair of sex-differentiating chromosomes that leads to someone being born with a penis and scrotum. Babies with xy chromosomes are usually assigned male at birth.
  • Y
    • Yeast infection
      • A type of vaginitis caused by an overgrowth of a yeast that naturally lives in the vagina/on the body, called candida albicans. Yeast infections may also occur in the penis or mouth. A yeast infection in the mouth or throat is called “thrush.”
  • Z
    • Ze (ze, zir, zirs, zirself)
      • A gender-neutral pronoun (or set of pronouns) some people use for themselves to replace “he,” “she,” or “they.”
    • Zygote
      • The single-celled organism that results from the joining of the egg and sperm (fertilization).