title: [Ultrastructural study of the placenta in post-term pregnancy].
authors.forename: Y P
authors.initials: YP
authors.lastname: Xi
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007751:Labor, Induced; D010920:Placenta / Q000648:ultrastructure*; D010927:Placental Insufficiency / Q000209:etiology; D011247:Pregnancy; D011273:Pregnancy, Prolonged