Overview Ovulation Inhibition of Two 4-phasic Oral Contraceptive Regimens Status: Completed Trial end date: 2004-02-01 Target enrollment: Participant gender: Summary The aim of the study is to investigate the ovulation inhibition of two 4-phasic oral contraceptive regimens. Phase: Phase 2 Details Lead Sponsor: BayerTreatments: Contraceptive AgentsContraceptives, OralDienogestEstradiolEstradiol 17 beta-cypionateEstradiol 3-benzoateEstradiol valeratePolyestradiol phosphate