Posted in Web Endometriosis | NICHD – Eunice Kennedy Shriver National … October 22, 2021 Endometriosis is a disease in which tissue similar to the lining of the uterus grows in other places in the body. It is one of the most common gynecological diseases, and its primary symptoms include pain and infertility. https://www.nichd.nih.gov/health/topics/endometriosis