 The third phase will be a pilot clinical study that addresses the second two goals by asking participants to undergo evaluations over time, similar to the way they would have to in a microbicide trial. Participants will complete study visits at baseline and after 2, 4, and 6 months, during which time they will answer questions about their sexual relationships and use of risk reduction behaviors. They will also provide urine, blood, and endo-cervical swab samples for testing for pregnancy, HIV, and sexually transmitted infection. Between the 4- and 6-month visits, participants will also be asked to participate in a 2-month substudy in which they use proxy pills or gels. They will then complete interviews about their experiences using the pills or gels. Some participants who decline to participate will be invited to complete brief interviews about why they chose not to participate. 