Hazards of the supine position in pregnancy.
D001018:Aortic Diseases / Q000209:etiology; D001027:Aortography; D003251:Constriction, Pathologic; D005260:Female; D005311:Fetal Hypoxia / Q000209:etiology; D006801:Humans; D007022:Hypotension / Q000209:etiology; D007083:Iliac Artery / Q000000981:diagnostic imaging; D007744:Obstetric Labor Complications / Q000209:etiology*; D011187:Posture; D011247:Pregnancy; D014682:Vena Cava, Inferior / Q000000981:diagnostic imaging