title: The prenatal diagnosis of neural tube defects.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis; D000757:Anencephaly / Q000175:diagnosis; D005260:Female; D006801:Humans; D009421:Nervous System Malformations; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016135:Spinal Dysraphism / Q000175:diagnosis; D014465:Ultrasonics; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000509:alpha-Fetoproteins