Since 2005, New York City has undertaken several initiatives to reduce the citys unintended teenage pregnancy rate, aiming to change the context of decisions to engage in sexual activity and to use contraception. These strategies included developmentally appropriate comprehensive sex education from middle school onward, the removal of barriers to access contraception, and reproductive health services that are youth friendlyparticularly male youth friendly. Rates of teenage pregnancy and sexual activity declined while these programs were under way. This brief is one in a series examining selected social service initiatives undertaken during the Bloomberg administration.