Endometrium is the lining in the part of the uterus above the level of internal os. Endometriosis is the occurrence of abnormal growth of endometrial cells outside the cavity of the uterus. It is a disease of the childbearing period. Endometriosis is extremely rare before menarche and disappears after menopause. The incidence is about 10% but is increasing on account of diagnostic... https://www.aashaayurveda.com/blog/what-is-endometriosis-symptoms-cause-and-treatment-endometriosis-doctors