Health Tip: Where Endometriosis May Occur
Dec. 12 -- (HealthDay News) -- Endometriosis occurs when tissue that should only line the uterus (endometrium) grows somewhere else.
The condition can cause pain before and during the menstrual period, and can sometimes lead to infertility, according to the American Congress of Obstetricians and Gynecologists.
The organization says endometriosis most often affects: