Ovulatory bleeding is defined as a small amount of vaginal bleeding around the time of ovulation, which may be accompanied by a small amount of blood in the vaginal leucorrhea discharge, or blood may be clearly observed. The sudden fluctuation of estrogen produced by the ovaries at the time of ovulation and the decrease of estrogen level reduce the effect of maintaining the proliferation of the endometrium, while progesterone does not immediately have sufficient amount to inhibit the endometrium, which in turn results in localized shedding of the endometrium, which flows out through the vagina and forms bleeding. Ovulation usually occurs about 14 days before the next menstrual period, and a small amount of bleeding during this period is mostly normal. If it occurs every month, you can visit the hospital to check for possible endometrial irregularities or endometrial polyps; if ovulatory bleeding occurs occasionally, it is usually not a big problem. If the patient needs treatment, she can take short-acting oral contraceptives to inhibit ovulation and treat ovulatory bleeding under the guidance of a doctor, or she can use progesterone to achieve a therapeutic effect as well.