 This is a randomized, open-label study to evaluate pituitary ovarian suppression in healthy, reproductive-aged women using three different regimens of oral contraceptives OCs. Two extended regimen OCs, Seasonale levonorgestrelethinyl estradiol 0.150.03 mg for 84 days followed by 7 days of placebo, and Seasonique levonorgestrelethinyl estradiol 0.150.03 mg for 84 days followed by 7 days of ethinyl estradiol 0.01 mg, and a 28-day regimen OC, Portia levonorgestrelethinyl estradiol 0.150.03 mg for 21 days followed by 7 days of placebo. 