The term abnormal vaginal bleeding can refer to abnormally heavy and/or prolonged periods, bleeding in between periods, bleeding after sex, bleeding after menopause, and irregularities in cyclical bleeding (either unusually frequent or infrequent menstrual cycles lasting less than 21 days or more than 35 days in length). While abnormal vaginal bleeding can affect women of any age, it is most common during the first years following the onset of menstruation and in the years leading up to menopause.
The cause of abnormal bleeding can be separated into two basic categories – anatomic and hormonal.