This report presents the results of an external assessment of youth-focused HIV/AIDS prevention program promoting abstinence before marriage and being faithful in a monogamous relationship as primary prevention approaches for youth aged 10-24. The Abstinence, Be Faithful Prevention for Youth Program (ABY) sought to: delay first intercourse among youth not yet sexually active, increase "secondary abstinence" among unmarried people, increase fidelity in marriage and monogamous relationships among youth and the general population, reduce sexual coercion and violence, reduce transactional and cross-generational sex and reduce other unhealthy sexual behaviors that increase vulnerability to HIV.