Understanding the impact of effective teenage pregnancy prevention programs.

A review of five rigorously evaluated adolescent pregnancy prevention programs shows that all five incorporate an emphasis on abstinence or delay of sexual initiation, training in decision-making and negotiation skills, and education on sexuality and contraception. Four of the five directly or indirectly provide access to contraceptive services. Comparisons between treatment and control groups show that all four programs that measured changes in rates of sexual initiation among adolescents had a significant effect on that outcome, reducing the proportion of adolescents who initiated sexual activity by as much as 15 percentage points; the programs were most successful when they targeted younger adolescents. Three of these four programs also significantly increased rates of contraceptive use among participants relative to controls; the most successful programs, which increased contraceptive use by as much as 22 percentage points, provided access to contraceptive services and targeted adolescents who were younger and those who were not yet sexually experienced. Two programs significantly decreased the proportion of adolescents who became pregnant; these programs were the two that were most active in providing access to contraceptive services.