title: Letter: Screening for neural-tube defects.
mesh_terms: D000757:Anencephaly / Q000175:diagnosis*; D003365:Costs and Cost Analysis; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016135:Spinal Dysraphism / Q000175:diagnosis*