What is endometriosis?

Endometriosis is a condition where the endometrial tissue (uterine lining) is found in locations outside the uterus. This most commonly involves the lowest portion of the pelvis, surface of the fallopian tubes, surfaces of the ovaries, bowel or bladder. With more advanced disease, endometriosis can grow deeply within the ovaries, forming cysts called endometriomas (chocolate cysts). Endometriosis is most often associated with dysmenorrhea, chronic pelvic pain, and/or painful intercourse. It also may be completely asymptomatic. The connection between endometriosis and infertility is unclear and may depend on the stage of the disease.