👉 Endometriosis is a condition that occurs when the lining of the uterus (endometrium) grows outside the uterus, typically around or in the fallopian tubes. This can cause pain, bleeding, and other symptoms. Endometriosis is characterized by two main types: endometrioid disease and endometroplastic disease. In endometrioid disease, the endometrial tissue grows in the fallopian tubes and then spreads to surrounding tissues such as the ovar