What is ovulation bleeding? Ovulation bleeding refers to vaginal bleeding in women during ovulation. Generally, bleeding during ovulation is a small amount of bright red, lasts briefly, and does not cause pain or other abnormal symptoms. The bleeding may be caused by the ovary rupturing when it releases the egg, or it may be minor bleeding from an area such as the cervix. Ovulation bleeding is a physiological phenomenon in most cases, but it also occurs