Subjects will wear an EVRA® patch or take CILEST® during each of the three 7-day treatment periods; treatment periods will be separated by a 21-day washout period. When a subject is to wear EVRA®, a patch from 1 of the 6 selected commercial lots will be applied on the buttock and worn for 7 days. Patches will be applied by the investigator or designated study unit personnel. All patches will be worn on the upper outer quadrant of the same buttock, but not necessarily in the exact same position. The investigator or designated study unit personnel will remove the patches and will evaluate the adhesion of the patches before removal. When a subject is to receive CILEST®, tablets from 1 of the 3 selected commercial lots will be administered daily for 7 consecutive days. A minimum of 21 days after removal of the patch or the seventh dose of CILEST®, the subject will begin another treatment period, until she completes 3 open-label treatment periods.