Is Lupron an Effective Treatment for Endometriosis and Endo-Related Infertility? Endometriosis is a gynecological disease in which the tissues lining the inside of the uterus are found on the fallopian tubes, ovaries, intestines, and other parts outside the uterus. This tissue works in the same way as the tissues found in the uterus. They break apart and bleed during your menstrual cycle. It might lead to pain, inflammation, and swelling in the surrounding area....