Oral contraceptives: ethinyl estradiol binds with higher affinity than mestranol to macromolecules from the sites of anti-fertility action.
D000818:Animals; D001665:Binding Sites; D001667:Binding, Competitive; D004958:Estradiol / Q000378:metabolism; D004997:Ethinyl Estradiol / Q000378:metabolism*; D005260:Female; D007031:Hypothalamus / Q000378:metabolism*; D007700:Kinetics; D046911:Macromolecular Substances; D008656:Mestranol / Q000378:metabolism*; D010902:Pituitary Gland / Q000378:metabolism*; D051381:Rats; D011956:Receptors, Cell Surface; D014316:Tritium; D014599:Uterus / Q000378:metabolism*
D046911:Macromolecular Substances; D011956:Receptors, Cell Surface; D014316:Tritium; D004997:Ethinyl Estradiol; D004958:Estradiol; D008656:Mestranol