If the menstrual cycle is regular, ovulation is usually about two weeks before the next menstrual period, and the appearance of brown vaginal discharge during this time period is a manifestation of ovulation bleeding, which is a physiological phenomenon. It is a physiological phenomenon. It is caused by the fluctuation of estrogen levels in a woman’s body when she is ovulating, resulting in partial stripping of the endometrium. Usually the bleeding is relatively small and short-lived, usually ending in 3-5 days, and does not affect the normal ovulation of women, nor does it affect normal fertilization. Usually there is no need for treatment, but there are women who bleed more during ovulation, for example, just like menstruation. Some women have 2 periods a month and both periods are heavy. This may affect the woman’s quality of life and the frequent bleeding can lead to hemorrhagic anemia. This group of patients needs to be treated with oral estrogen, which is usually started before ovulation, just before bleeding, and continued until bleeding stops.