Folic acid supplements.
Howell
S
S
Underwood
M
M
Carter
Y
Y
D004349:Drug Packaging; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage*; D006266:Health Education; D006801:Humans; D009436:Neural Tube Defects / Q000517:prevention & control; D016742:Preconception Care; D011247:Pregnancy
D005492:Folic Acid