What is ovulation bleeding? Ovulation bleeding refers to slight or heavy vaginal bleeding during the period when a woman is ovulating. Under normal circumstances, bleeding during ovulation is a normal physiological phenomenon, the symptoms are mild, and there is no need to worry too much. This is due to the rupture of follicles, resulting in the rupture and bleeding of some capillaries. Ovulation bleeding usually lasts for 1-2 days, is lighter in color, and is not accompanied by obvious pain or discomfort. The causes of ovulation bleeding: First of all, ovulation bleeding is closely related to the hormone levels and menstrual cycle inside the female body.