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- imperforate hymen
- A condition where the hymen is unusually thick and covers the vaginal
entrance completely often making intercourse difficult or impossible without
surgery.
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- implantation
- The embedding of the fertilized egg into the lining of the uterus.
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- impotence
- Out of vogue, but still commonly used, term for erectile dysfunction.
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- impregnate
- To make pregnant.
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- in vitro fertilization (IVF)
- A technique in which sperm and egg are removed from the body, combined in
the laboratory, then implanted as a fertilized egg in the woman's uterus. A
means of treating infertility; the result is commonly referred to as a
"test tube baby."
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- incest
- Sexual activity between relatives or family members.
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- infanticide
- The killing of a baby after it is born.
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- infatuation
- Foolish and irrational love; often known as a "crush."
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- infectious prostatitis
- Infection and inflammation of the prostate gland usually caused by the E.
coli bacteria.
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- infertility
- The inability to conceive a child due to factors in the male or female.
The term is only medically appropriate after the couple has been trying for
a year or more.
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- infibulation
- The ritual practice of cutting off the inner labia and stitching together
the outer lips; a part of female circumcision practiced in some cultures.
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- inhibin
- A hormone produced by the testes, which regulates FSH levels, and thus,
spermatogenesis.
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- inhibited orgasm
- Persistent difficulty in having orgasm or inability to have orgasm; in
males, also called ejaculatory incompetence or retarded ejaculation.
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- inhibited sexual desire
- A sexual disorder characterized by low or absent sexual desire.
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- iniguinal canal
- The passageway in the male that leads from the abdomen to the scrotum
through which the testes usually descend shortly before birth. It is a
frequent site of hernias.
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- inner lips
- The folds of skin on either side of the vaginal entrance, between the
outer lips, that enclose the clitoris and the vaginal opening. Also known as
labia minora.
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- intercourse
- Sexual activity in which the penis is inserted into an orifice such as the
vagina or anus; the term is often modified accordingly (e.g. anal
intercourse).
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- interfemoral intercourse
- Sexual activity in which the penis is thrust between the thighs of a
partner
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- internalized homophobia
- Hatred of oneself due to homosexual orientation.
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- interstitial cells
- Cells in the testes that secrete male sex hormones; also known as Leydig
cells.
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- intrauterine device
- A plastic or metal device that is inserted into the uterus by a physician
for contraceptive purposes. The exact mechanism of contraceptive action is
unknown. Commonly referred to as an IUD.
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- introitus
- The opening to the vagina.
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- intromission
- Insertion of the penis into the vagina.
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- involution
- Contractions of the uterus following childbirth that return it to its
prebirth size and shape.
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