[Placental ultrastructure of rats with prolonged pregnancy].
D000818:Animals; D005260:Female; D010920:Placenta / Q000648:ultrastructure*; D011247:Pregnancy; D011270:Pregnancy, Animal; D011273:Pregnancy, Prolonged; D051381:Rats
Ultrastruktura na platsentata ot prenosili bremenni plukhove.