Background:
Endometriosis (EMs) is with the activity of endometrial tissue outside the endometrium. The ectopic endometrial may invade any part of the body, but the vast majority located in the pelvic.The most common places are the ovarian and the utero-sacral ligaments, followed by the uterus, rectum lacunae, visceral peritoneum, rectovaginal and so on. Endometriosis is a hormone-dependent diseases:the ectopic endometrial can be gradually absorbed after menopause or the removal of both ovaries; pregnan...