Ultrastructural observation of the placenta in prolonged pregnancy.
D000328:Adult; D002824:Chorionic Villi / Q000648:ultrastructure; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008854:Microscopy, Electron; D010920:Placenta / Q000648:ultrastructure*; D011247:Pregnancy; D011273:Pregnancy, Prolonged