title: Relationship between the oral contraceptive and folic acid metabolism. Serum folate concentrations.
mesh_terms: D002986:Clinical Trials as Topic; D003276:Contraceptives, Oral / Q000494:pharmacology*; D005040:Ethynodiol Diacetate / Q000008:administration & dosage; D005260:Female; D005492:Folic Acid / Q000097:blood / Q000378:metabolism*; D005494:Folic Acid Deficiency / Q000139:chemically induced; D006801:Humans; D008656:Mestranol / Q000008:administration & dosage; D009640:Norethindrone / Q000008:administration & dosage; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral; D005040:Ethynodiol Diacetate; D005492:Folic Acid; D008656:Mestranol; D009640:Norethindrone