title: Antenatal detection of severe central nervous system defects.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis; D000757:Anencephaly / Q000175:diagnosis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016136:Spina Bifida Occulta / Q000175:diagnosis*; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins