<prompt> Most common cause of postmenopausal bleeding isEndometrial cancerEndometrial polypsEndometrial atrophyEndometrial hyperplasia  <response>: Causes of Postmenopausal Uterine BleedingCausesPercentageEndometrial atrophy60-80Estrogen replacement therapy15-25Endometrial polyps2-12Endometrial hyperplasia5-10Endometrial cancer10Reference: Novaks gynaecology; 14th edition; Chapter 35; Uterine cancer 