[Placental ultrastruct in rats with experimental diabetes mellitus].

The placenta of Wistar rats with various forms of diabetes mellitis was studied by electron microscopy. Metabolic disturbances characteristic of alloxan diabetes mellitus failed to derange the trophoblast ultrastructure during the existence of placenta and produced no changes in the ultrastructure of the fetal vessels similar to the changes in the capillary ultrastructure of other organs and tissues in this pathology.