title: Vitamin supplementation and neural tube defects.
mesh_terms: D003365:Costs and Cost Analysis; D005260:Female; D006801:Humans; D008431:Maternal-Fetal Exchange; D009436:Neural Tube Defects / Q000517:prevention & control*; D011247:Pregnancy; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins