A comparative study of sequential and simultaneous estrogen-progestogen cyclic medication.
D003276:Contraceptives, Oral / Q000008:administration & dosage* / Q000009:adverse effects; D005040:Ethynodiol Diacetate / Q000008:administration & dosage; D005260:Female; D006801:Humans; D008656:Mestranol / Q000008:administration & dosage*; D009640:Norethindrone / Q000008:administration & dosage*; D011372:Progestins / Q000008:administration & dosage*
D003276:Contraceptives, Oral; D011372:Progestins; D005040:Ethynodiol Diacetate; D008656:Mestranol; D009640:Norethindrone