Vitamins during pregnancy and neural tube defects.
D005260:Female; D005492:Folic Acid / Q000627:therapeutic use; D006801:Humans; D009436:Neural Tube Defects / Q000209:etiology / Q000517:prevention & control*; D011247:Pregnancy; D012307:Risk Factors; D015983:Selection Bias; D014815:Vitamins / Q000627:therapeutic use*
D014815:Vitamins; D005492:Folic Acid