E4 FREEDOM (Female Response Concerning Efficacy and Safety of Estetrol/Drospirenone as Oral Contraceptive in a Multicentric Study) - EU/Russia Study

15 mg estetrol and 3 mg drospirenone tablets administered once daily for 13 consecutive cycles following a 24/4-day regimen, i.e. one 15 mg E4/3 mg DRSP active tablet per day for 24 consecutive days followed by one placebo tablet per day for 4 consecutive days.