Study Evaluating the Bioequivalence of Levonorgestrel/Ethinyl Estradiol Combinations in Cycling Women

Inclusion Criteria: * Women aged 18 to 35 years. * Healthy as determined by the investigator on the basis of medical history and screening evaluations. * Must have a history of normal menstrual cycles (24 to 34 days) for the 3-month period preceding entry into the study. Exclusion Criteria: * Any surgical or medical condition that may interfere with the absorption, distribution, metabolism, or excretion of the test article. * Presence, history, or family history of thrombophlebitis, thrombosis, or thromboembolitic disorders, deep vein thrombosis, pulmonary embolism, or known coagulopathy. * Bethesda system report of low-grade squamous intraepithelial lesion or greater for a cervical cytologic smear obtained within the last 3 months.