[Ultrastructure of the chorionic epithelium in early stages of pregnancy].
D005321:Extraembryonic Membranes / Q000033:anatomy & histology*; D005260:Female; D006651:Histocytochemistry; D006801:Humans; D008854:Microscopy, Electron; D010920:Placenta / Q000033:anatomy & histology*; D011247:Pregnancy
Ul'trastruktura épiteliia khoriona rannikh srokov beremennosti.