title: Letter: Prenatal diagnosis.
mesh_terms: D000653:Amniotic Fluid; D000013:Congenital Abnormalities / Q000175:diagnosis; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D005326:Fetal Proteins / Q000032:analysis; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014463:Ultrasonography
chemical_list: D005326:Fetal Proteins