[The ultrastructure and electron-histochemical characteristics of the stromal cells of the endometrium].

Histologic, histochemical, electron-microscopic and ultracytochemical studies of cellular populations of the endometrial stroma and the vascular component, carried out in 33 women of a productive age in various phases of the cycle (on days 5-28) showed interactions of the cellular elements (fibroblast-like cells, predecidual cells, endometrial granulocytes, endotheliocytes, cells of a hematogenic origin) within and between the populations over the course of the cycle; all the cells were found functionally heterogenic, this underlying the endometrial homeostasis maintenance. Disturbances in any of the components of these interactions may result in a pathologic process in the uterine body mucosa.