Inhibition of Ovulation, Patch, Ethinylestradiol and Gestodene

Inclusion Criteria: * Signed informed consent, * BMI: 18 - 30 kg/m², * Healthy female volunteers, * Age 18-35 years (smoker not older than 30 years, inclusive), * Ovulatory pre-treatment cycle, at least 3 month since delivery, * Abortion or lactation before the first screening examination, * Willingness to use non-hormonal methods of contraception during entire study Exclusion Criteria: * Contraindications for use of combined (estrogen/gestodene) contraceptive (e.g. history of venous/arterial thromboembolic disease * Regular intake of medication other than OCs * Clinically relevant findings (blood pressure, physical and gynaecological examination, laboratory examination) * Anovulatory pre-treatment cycle