Arteriovenous crossings on the chorial surface of the human placenta in abnormal pregnancy and development.
D001158:Arteries / Q000002:abnormalities*; D000013:Congenital Abnormalities; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D010920:Placenta / Q000098:blood supply*; D010923:Placenta Previa; D006831:Polyhydramnios; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014680:Veins / Q000002:abnormalities*