Sonographic assessment of the endometrium in postmenopausal women is generally based on total thickness as only criterion. The cut-off values recommended in literature, however, vary considerably. The purpose of this study was to examine the significance of sono-morphology besides biometry of the endometrium. If vaginosonography showed an endometrial thickness of 3 mm or less, all histological findings were inconspicuous; beginning at a thickness of 10 mm only hyperplasias, polyps and carcinomas were found. In the range between, including more than one-third of our patients, the structure can point out the type of histology: Homogeneity, low echogeneity and a median echo are not important findings, but inhomogeneity and high echogeneity point to pathological changes of the endometrium. Using combined, metric-structural criteria in vaginosonography of the endometrium, not only the predictivity, but above all the selectivity is improved.