Endometriosis is a common cause of infertility. The reasons endometriosis leads to infertility mainly include the following aspects: First, if endometriosis occurs above the ovaries, this condition is referred to as ovarian chocolate cysts. This disease can cause ovarian ovulation disorders. Second, endometriosis easily leads to pelvic adhesions, which can affect the function of the fallopian tubes, making it difficult for the fimbrial end of the tubes to capture eggs. Endometriosis is very common among women with infertility; therefore, a thorough examination is essential when screening for causes of infertility. If endometriosis is present, surgical or medical treatment should be chosen to improve the symptoms of endometriosis as much as possible and alleviate the causes of infertility.