An Open-label Study to Evaluate Contraceptive Efficacy and Safety of the Transdermal Contraceptive System of Norelgestromine and Ethinyl Estradiol [clinicaltrials:NCT00307632]

An Open-label Study to Evaluate Contraceptive Efficacy and Safety of the Transdermal Contraceptive System of Norelgestromine and Ethinyl Estradiol [clinicaltrials:NCT00307632]