title: Letter: Amniotic-fluid A.F.P. and omphalocele.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D005260:Female; D005326:Fetal Proteins / Q000032:analysis*; D006554:Hernia, Umbilical / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D005326:Fetal Proteins; D000509:alpha-Fetoproteins