On folic acid in pregnancy.
D000748:Anemia, Macrocytic / Q000209:etiology; D005260:Female; D005492:Folic Acid / Q000627:therapeutic use; D005494:Folic Acid Deficiency; D006801:Humans; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic
D005492:Folic Acid