A woman with dysfunctional uterine bleeding has abnormal vaginal bleeding that is not caused by a bleeding lesion in the uterus.

Normal menstrual bleeding should last about 5 days, but varies from 3 to 7 days. Usually, periods that last for longer than 7 days are abnormal. Normal menstrual blood loss is during a period is 30 cc (2 Tablespoons) to 250 cc (1 cup).

Dysfunctional uterine bleeding is common. Dysfunctional uterine bleeding occurs during the childbearing years.