Three contraception regimens will be compared in an open label, randomized, crossover design. The three regimens are Ortho-Cyclen® as the standard reference oral contraceptive, Ortho Evra® patch formulation, and an investigational two month patch formulation. The two month patch formulation will consist of applying Ortho Evra® for 7 weeks in a row with the 8th week off compared to 3 weeks of patch application with the 4th week off in the standard patch cycle. Subjects will take each hormonal regimen for two months.