title: Letter: Equivocal amniotic A.F.P. levels associated with open spina bifida.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D003951:Diagnostic Errors; D005260:Female; D005326:Fetal Proteins / Q000032:analysis*; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016135:Spinal Dysraphism / Q000175:diagnosis*; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D005326:Fetal Proteins; D000509:alpha-Fetoproteins