title: Vitamins in early pregnancy.
authors.forename: D
authors.initials: D
authors.lastname: Smithells
mesh_terms: D000013:Congenital Abnormalities / Q000209:etiology*; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage*; D006801:Humans; D007231:Infant, Newborn; D009436:Neural Tube Defects / Q000517:prevention & control*; D011247:Pregnancy; D011295:Prenatal Care; D014801:Vitamin A / Q000009:adverse effects*
chemical_list: D014801:Vitamin A; D005492:Folic Acid