[Electron microscopy studies on the early development of the endocervical epithelium in human fetuses].

In the 14, week of fetal life the cervical epithelium consists of a monolayer blastemic-like epithelium of undifferentiated cuboidal cells and ciliated cells. At the beginning of the 5. month there are circumscript epithelial proliferations forming cryptical infoldings. In the undifferentiated epithelial cells there appears glycogen and at the same time in the "Talsohlenzellen" precourses of secretory granules can be found.