[Histometric studies of placentones of the human placenta].

Regionally different structures of placental terminal villi in the placentones have been shown in earlier publications. In this study the earlier results should be tested by means of histometry. The earlier results could be proved. It was shown that the villi in the centers of the circulation units are less differentiated than those in the peripherie of the placentones. The results were statistically significant. The reasons for the regionally different architecture of the placental villi are discussed with respect to the results of other authors working in the same field.