2 years, menstruation twice a month, may be due to ovulation bleeding, may also be suffering from uterine fibroids, endometrial polyps and other diseases caused. 1. Ovulation bleeding: a normal physiological phenomenon. Women usually ovulate about 14 days before their next period. After ovulation, some women will have a small amount of endometrial shedding symptoms, so that a small amount of vaginal bleeding, thus leading to women’s vaginal bleeding 2 times a month, but this will not cause adverse effects on the body. 2. Uterine fibroids: If you usually take hormonal drugs such as compound norethindrone tablets and nil estradiol tablets regularly, it may lead to high estrogen level in the body and induce uterine fibroids. Patients may have symptoms of irregular vaginal bleeding, leading patients to think that their menstruation comes twice a month. 3. Endometrial polyps: long-term gynecological inflammation stimulation, intrauterine foreign body stimulation, are typical causes of endometrial polyps. Patients may have irregular uterine bleeding, abdominal pain, infertility and other symptoms. If you have menstruation twice a month for a long period of time, it is recommended to go to the gynecologist in time to avoid delaying your condition.