Women will be enrolled in this study for 6 to 12 months. Study visits will take place monthly. At each visit, participants will complete a medical/menstrual history and undergo pregnancy testing. Each quarter, participants will undergo a structured interview about sexual practices and will receive HIV and STD tests, education, and counseling. Participants will also undergo a pelvic exam with wet mount testing for bacterial vaginosis, candidiasis, and trichomoniasis. Colposcopic evaluations will be performed at selected sites. Pap smears will be performed at sites with the capacity and expertise to prepare and interpret the smears and provide appropriate follow-up care to participants with abnormal results.