Introduction Abnormal frequency and intensity of menses polymenorrhea - frequent oligomenorrhea - infrequent hypomenorrhea - low intensity bleeding hypermenorrhea - high intensity bleeding metrorhagia - frequent but irregular bleeding menometrorrhagia - high intensity, irregular bleeding Most commonly occurs at the beginning (puberty) or end (menopause or perimenopause) of menses typically a result of anovulation (anovulatory dysfunctional uterine bleeding) without a corpus luteum there is an estrogen-progesterone inbalance progesterone is required for maintenance of endometrium may also occur with ovulation (inadequate luteal phase) inadequate maintenance/maturation of corpus luteum Bleeding past menopause is most commonly endometrial hyperplasia/cancer Treatment Medical (anovulatory, inadequate luteal phase) progesterone OCP