Ovulatory bleeding is mainly due to a significant drop in estrogen levels after the follicle matures and ovulates. Individual women therefore have lower estrogen levels that cannot sustain the endometrial growth, thus causing a small amount of breakthrough bleeding caused by localized shedding of the endometrium. In most cases, the corpus luteum forms after ovulation, secreting estrogen and progesterone to repair the endometrium and the bleeding stops. Ovulatory bleeding manifestations: 1. A small amount of bleeding visible to the naked eye, less than the amount of menstruation, as spot bleeding or blood in the leukorrhea, short duration; 2. May be accompanied by abdominal distension or vague pain; 3. Occurrence frequency is variable, may occur monthly or occasionally. Usually, occasional ovulatory bleeding does not affect normal conception. If ovulatory bleeding persists, further treatment should be carried out if the above diseases are excluded because the bleeding occurs during ovulation.