Long-term study of oral contraception with norethindrone 2 mg. and mestranol 0.1 mg.
D003276:Contraceptives, Oral / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008656:Mestranol / Q000008:administration & dosage*; D009640:Norethindrone / Q000008:administration & dosage*
D003276:Contraceptives, Oral; D008656:Mestranol; D009640:Norethindrone