[Results of research on aplasia of an umbilical artery with special reference to twin pregnancy].
D005260:Female; D005312:Fetal Blood; D006801:Humans; D011247:Pregnancy; D059285:Pregnancy, Twin; D014427:Twins; D014469:Umbilical Arteries; D014470:Umbilical Cord / Q000098:blood supply*
TWINS; UMBILICAL CORD/blood supply