The clinical feature of endometriosis is painful menstruation, which tends to worsen over time. If the endometrial tissue is displaced to the ovaries, it can lead to the formation of ovarian endometriomas, often called "chocolate cysts", which can cause the ovaries not to release eggs and generally affects fertility. If endometrial tissue displaces to the uterus, it can cause adenomyosis, leading to a uniformly thickened uterine muscle layer and uneven muscle wall echoes, resulting in an enlarged uterus, which also impacts fertility. Therefore, it is crucial for patients with endometriosis to seek early treatment and prepare for pregnancy as soon as possible. Endometriosis, which affects fertility, is typically characterized by painful menstruation that gradually worsens, and generally, painkillers are insufficient for treating this condition.