title: Letter: Maternal alpha-fetoprotein and neural-tube defects.
mesh_terms: D000510:Alpha-Globulins / Q000032:analysis*; D000653:Amniotic Fluid / Q000032:analysis*; D000757:Anencephaly / Q000175:diagnosis*; D005260:Female; D005326:Fetal Proteins / Q000032:analysis*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011446:Prospective Studies; D016135:Spinal Dysraphism / Q000175:diagnosis*
chemical_list: D000510:Alpha-Globulins; D005326:Fetal Proteins