The following glossary is adapted from the glossary provided by Planned Parenthood at https://www.plannedparenthood.org/learn/glossary.
Failure rate: The number of women who become pregnant each year out of every 100 who use a birth control method.
Fallopian tube: One of two narrow tubes that carry the egg from the ovary to the uterus.
Family planning: Voluntary planning and action by individuals to have the number of children they want, when they want them.
FAMs or fertility awareness-based methods: Ways to prevent or plan pregnancy by predicting ovulation based on understanding a woman’s fertility cycle.
Fecundity: Technically, the physical ability of a woman or couple to have a child. Often used as a synonym for ”fertility.”
Female condom: A polyurethane pouch with flexible rings at each end that is inserted deep into the vagina like a diaphragm. It is an over-the-counter, reversible barrier method of birth control that provides protection against many sexually transmitted infections. Formerly called a vaginal pouch. May also be used for anal intercourse.
Female ejaculation: The spurting of fluid out of the urethra during intense sexual excitement or orgasm. The fluid is most likely secreted by the Skene’s glands, which are located in the vulva near the opening of the urethra. Female ejaculation may be associated with stimulation of the G-spot and occurs in 1 out of 10 women.
Female prostate glands: Term used by some authorities 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 in men.
Femcap: See cap.
Fertility: The ability of women or couples to have children. Technically, the childbearing performance of individuals, couples, groups, or populations, i.e., the number of births they have.
Fertility awareness-based methods: see FAMS.
Fertility cycle: Also called the menstrual cycle. The monthly recurrence of ovulation, the shedding of the lining of the uterus, 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 that forms the zygote.
Fetus: The organism that develops from the embryo at the end of about eight weeks of pregnancy (10 weeks since a woman’s last menstrual period) and receives nourishment through the placenta.
Fidelity: Strict observance of promises, especially of sexual faithfulness.
Follicle: A cavity and sac in the ovary that contains a maturing egg.
Follicle stimulating hormone or FSH: Made by the pituitary gland, it stimulates the growth of the egg in women and the development of sperm in men.
Fordyce spots: Small, slightly bumpy yellowish or white papules or spots on the inside of the cheeks or lips, or on the glans or shaft of the penis, or the labia of the vulva. They are sebaceous glands and 50 to 100 may appear in one area. They are completely harmless, are not sexually transmitted, and are not infectious.
Foreskin: A retractable tube of skin that covers and protects the glans (head) of the penis.
Frenulum: In women, the highly sensitive tissue where the inner labia join below the glans of the clitoris. In men, the highly sensitive, triangular piece of skin just below the glans of the penis.
FSH: See follicle stimulating hormone.