title: Amniotic fluid midtrimester delta optical density measurements at 450 nm in Rh disease.
authors.forename: G H
authors.initials: GH
authors.lastname: Nelson
mesh_terms: D000653:Amniotic Fluid; D004899:Erythroblastosis, Fetal / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy