The following glossary is adapted from the glossary provided by Planned Parenthood at https://www.plannedparenthood.org/learn/glossary.
Gamete: A reproductive cell — egg or sperm.
Genitals: External sex and reproductive organs: the vulva in women, the penis and scrotum in men. Sometimes, the internal reproductive organs are also called genitals.
Genital herpes: An infection of herpes simplex virus types 1 or 2 in the area of the anus, buttocks, cervix, penis, vagina, or vulva. Very often there are no symptoms, while the most common symptom is a cluster of blistery sores.
Genital warts: Soft, flesh-colored growths caused by several types of the human papilloma virus. They may look like miniature cauliflower florets and are usually painless, but may itch.
Glans: The soft, highly sensitive tip of the clitoris or penis. In men, the opening to the urethra is located in the glans. Also called the “head” of the penis.
Gonadotropins: Hormones secreted by the pituitary gland that triggers puberty by stimulating the ovaries of women and the testes of men.
Gonads: The organs that produce reproductive cells — the ovaries of women, the testes of men.
Gonorrhea: A sexually transmitted bacterium that can cause sterility, arthritis, and heart problems.
Gräfenburg spot (G spot): An area of tissue, located about one-third of the way along the upper wall of the vagina. Stimulation of the G spot leads to intense sexual arousal and orgasm in some women, and is also associated with female ejaculation.
Gynecology: Sexual and reproductive health care for women.
Gynecologist: A medical doctor who specializes in women’s sexual and reproductive health.
Gynecomastia: A usually temporary condition during puberty in which the breasts of boys become larger and appear more feminine.