There is a gynecological disease called “ovarian chocolate cysts”, some people misunderstand that if you eat too much chocolate, it will run into the ovaries and give birth to cysts. In fact, eating chocolate and ovarian chocolate cysts are not related. Chocolate cysts are due to endometriosis in the ovary, bleeding, dissolution, concentration, and ultimately the formation of coffee-colored, like chocolate juice-like thick liquid, so its name, in essence, is a kind of ovarian endometriosis cysts. Gynecological clinic found that endometriosis is a common gynecological disease with dysmenorrhea and infertility as the main symptoms, mostly seen in women aged 30-45 years old, but before the age of 20 years of young patients are also many. It has been reported that the incidence of infertility is more than 30% in patients with endometriosis, and 1/3 or half of women with unexplained infertility have endometriosis, and the chances of infertility in such patients are 20 times higher than those without endometriosis. Endometriosis is a condition in which the endometrial tissue leaves its normal uterine cavity and grows and develops in any other part of the body. The causes are complex, and infertility can be caused by a combination of factors. However, it has been recognized that the reverse flow of menstrual blood, such as abortion, induced abortion, postoperative uterine stenosis and atresia, or obstruction of menstrual blood flow when the uterus is tilted backward and flexed backward, prompting the endothelial fragments to flow backward with the menstrual blood and be planted in various parts of the pelvic cavity through the fallopian tubes, leading to the onset of the disease. Therefore, no or fewer abortions and induced abortions, and timely correction of posterior uterine tilting can prevent and reduce its occurrence. Clinical findings, female athletes and ballet dancers suffering from endometriosis is more common than other professional women, may be related to their menstruation does not stop strenuous exercise, practicing and competitions, performances. Therefore, adolescent girls and women of childbearing age should take proper rest during menstruation and avoid strenuous exercise to prevent the occurrence of endometriosis.