Oral contraceptives and serum-folate level.
D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D005492:Folic Acid / Q000097:blood*; D005494:Folic Acid Deficiency / Q000139:chemically induced*; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications
D003276:Contraceptives, Oral; D005492:Folic Acid