What kinds of hemorrhages are most frequently seen in the field of obstetrics and gynecology?

Bleeding from the female productive organs is most frequently seen. Because abnormal bleeding during childbirth is often associated with great loss of blood, caution must be exercised. It is said that many of hemorrhages in the field of gynecology are caused by a disorder of physiological functions such as dysfunctional uterine bleeding (DUB) and menorrhagia.