Some women experience a small amount of vaginal bleeding during ovulation (calculated as 14 days before the next menstrual period), which is called ovulatory bleeding, also known as intermenstrual bleeding. Menstruation is the periodic shedding and bleeding of the endometrium in response to the cyclical changes of the ovaries. During each menstrual cycle, only a few follicles develop and mature, and ovulation occurs in only one of them. During ovulation, as the mature follicle ruptures and is discharged, there is a temporary drop in estrogen levels and the support of estrogen for the endometrium is temporarily lost, causing partial shedding of the endometrium, which is discharged together with blood, which is the cause of ovulatory bleeding. Later, with the formation of the corpus luteum of the ovary, the estrogen and progesterone levels rise rapidly, causing the damaged endometrium to repair quickly and the bleeding to stop. Therefore, ovulatory bleeding is a normal physiological phenomenon. If the amount of ovulatory bleeding is very small and occurs occasionally, it does not affect the body too much and does not require treatment. However, if the bleeding is heavy or incessant and frequent, first of all, attention should be paid to excluding organic lesions, and then appropriate treatment should be given.