causes for severe vaginal bleeding
Contact your health care provider if you experience any type of bleeding in the second or third trimester of your pregnancy. Placental Abruption: Vaginal bleeding may be caused by the placenta detaching from the uterine wall before or during labor. Only 1% of pregnant women have this problem, and it usually occurs during the last 12 weeks of pregnancy.
Normal vaginal bleeding, or menstruation, occurs every 21 to 35 days when the uterus sheds its lining, marking the start of a new reproductive cycle. A menstrual period may last for just a few days or more than a week. Your flow may be heavy or light and still considered normal.