title: Discordant umbilical cord structure in a twin gestation.
authors: J H
authors: JH
authors: Collins
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D008297:Male; D011247:Pregnancy; D014429:Twins, Dizygotic; D016216:Ultrasonography, Prenatal; D014470:Umbilical Cord / Q000000981:diagnostic imaging* / Q000473:pathology*