Subjects will be confined to the study unit for blood sample collections for determination of NGMN, NG, and EE plasma concentrations. Blood samples will be collected (via venipuncture) immediately before each dose and at specified time points after each dose is administered. Pharmacokinetic parameters of NGMN, NG, and EE, including Cmax, tmax, and AUC, after each treatment will be estimated by standard methods. Safety will be assessed throughout the study, and will be based on adverse events and changes in physical and gynecologic examinations (including breast examinations), vital signs, electrocardiograms (ECGs), and clinical laboratory test results. Three 7-day treatment periods; treatments separated by 21-day washout. Based on the randomization schedule, some subjects will wear an EVRA® patch in all 3 periods (on the upper outer quadrant of the buttock for 7 days), some will wear a patch in 2 periods and take CILEST® oral tablets once daily in 1 period, and some will wear a patch in 1 period and take CILEST® oral tablets once daily in 2 periods.