The MTN-032 trial is a two-phase exploratory sub-study of the ASPIRE and HOPE trials. A sample of up to 224 women who participated in ASPIRE will be selected for participation in Phase 1 of this study. Approximately 84 former Phase 1 participants who participated in HOPE will be selected for participation in Phase 2. There will be approximately 4-6 months allotted for recruitment and follow-up at each site for each phase.