title: Amniotic fluid alpha-fetoprotein levels in anencephaly and open spina bifida: validation of median cut-off limits.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D000757:Anencephaly / Q000175:diagnosis*; D005189:False Positive Reactions; D005260:Female; D005865:Gestational Age; D006801:Humans; D008591:Meningomyelocele / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D012016:Reference Values; D012189:Retrospective Studies; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins