title: Umbilical changes during pregnancy; a factor in disproving fetal respiration and transmission of fetal heart pulsations to the abdomen.
authors.forename: L
authors.initials: L
authors.lastname: DROSIN
mesh_terms: D000005:Abdomen; D005260:Female; D005318:Fetal Heart; D005333:Fetus; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy; D014470:Umbilical Cord