A condition of late pregnancy, labor, and the period immediately after delivery characterized by convulsions. In serious cases, sometimes followed by coma and death.

See Ectopic pregnancy, Appendix B.

The release of semen from the penis at orgasm.

A chronic and often extreme swelling and hardening of skin and tissue just beneath the skin, especially of the legs and scrotum, due to an obstruction in the lymphatic system (see filariasis).

The product of fertilization of an egg (ovum) by a sperm during the first 8 weeks of development.

Malignant (cancerous) growth in the lining of the uterus.

A condition in which tissue of the endometrium grows outside the uterus. Tissue may attach itself to the reproductive organs or to other organs in the abdominal cavity. Can cause pelvic pain and impair fertility.

The membrane that lines the inner surface of the uterus. It thickens and is then shed once a month, causing monthly bleeding. During pregnancy, this lining is not shed but instead changes and produces hormones, helping to support the pregnancy (see Female Anatomy).

A condition during breastfeeding that occurs when more milk accumulates in the breasts than the infant consumes. May make breasts feel full, hard, tender, and warm. Can be prevented (or relieved) by breastfeeding often and on demand.

A coiled tube (duct) attached to and lying on the testes. Developing sperm reach maturity and develop their swimming capabilities within this duct. The matured sperm leave the epididymis through the vas deferens (see Male Anatomy).

Inflammation of the epididymis.

A chronic disorder caused by disturbed brain function. May involve convulsions.

Hormone responsible for female sexual development. Natural estrogens, especially the hormone estradiol, are secreted by a mature ovarian follicle, which surrounds the egg (ovum). Also, a group of synthetic drugs that have effects similar to those of natural estrogen; some are used in some hormonal contraceptives.

When a contraceptive implant or intrauterine device fully or partially comes out of place.