title: Prevention of neural tube defects by improvement in maternal diet and preconceptional folic acid supplementation.
mesh_terms: D002986:Clinical Trials as Topic; D004032:Diet; D004311:Double-Blind Method; D005260:Female; D005492:Folic Acid / Q000627:therapeutic use*; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000517:prevention & control*; D011247:Pregnancy; D011446:Prospective Studies; D011897:Random Allocation; D012189:Retrospective Studies
chemical_list: D005492:Folic Acid