[Factors influencing the blood folic acid level in pregnant women].
Hao
L
L
Tang
Y
Y
D005260:Female; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D009436:Neural Tube Defects / Q000517:prevention & control; D011247:Pregnancy / Q000097:blood*
D005492:Folic Acid