The 784 cases, from which 701 complained of abnormal uterine bleeding, were reviewed by age groups, presenting symptoms, sex steroid medication and endometrial findings. Endometrial polyps and endometritis, which showed an incidence of 17.5 and 10.0%, respectively, were correlated with clinicopathologic findings. Peri- and postmenopausal bleeders were investigated with special reference to hormone therapy and endometrial patterns. Dysfunctional uterine bleeding was diagnosed in 48.7% of the subjects during reproductive years. Pathologic findings were found to explain the clinical symptoms in 60.6% of the entire study group.