title: Comparative studies on two combination oral contraceptives, one containing synthetic estrogen, the other "natural" estrogens.
abstract: Two combined oral contraceptives, one containing ethinyl estradiol and the other micronized estradiol and estriol, were compared by measuring a variety of endocrine and renal parameters over nine months. Significant changes were observed in plasma renin activity (P.R.A.) on the synthetic estrogen. Much larger changes were observed in the total urinary estrogens on patients taking the "natural" estrogens reflecting the amount of estrogens required to be excreted in the urine.
mesh_terms: D000328:Adult; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology*; D004958:Estradiol / Q000494:pharmacology*; D004964:Estriol / Q000494:pharmacology*; D004967:Estrogens / Q000652:urine; D004997:Ethinyl Estradiol / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects; D012083:Renin / Q000097:blood
chemical_list: D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D004967:Estrogens; D004997:Ethinyl Estradiol; D004958:Estradiol; D012083:Renin; D004964:Estriol