CP-690,550 And Oral Contraception Drug-Drug Interaction Study

Inclusion Criteria: * Healthy female subjects * No evidence of active or latent or inadequately treated infection with Mycobacterium tuberculosis Exclusion Criteria: * Any medical reason which would contraindicate the administration of oral contraceptives * Clinically significant infections within the past 3 months or history of febrile illness within 5 days * Positive screening test for Hepatitis B surface antigen, anti Hepatitis C antibody, or human immunodeficiency virus * Pregnant or nursing women, and women of childbearing potential who are unwilling or unable to use an acceptable method of nonhormonal contraception