title: [Study of neural tube defects].
mesh_terms: D005260:Female; D005325:Fetal Organ Maturity; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D009436:Neural Tube Defects / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology; D011247:Pregnancy; D011296:Prenatal Diagnosis; D013997:Time Factors