... experiences, including a teen's family environment, their individual attitudes and behaviors, and peer attitudes and behaviors. In addition, the characteristics of a teen's community, including ... positive reproductive health behaviors, indicating that involving teens in outside activities may help them avoid other risk-taking behaviors. In contrast, teens who are already involved in other ... show a range of activities that may help reduce unintended pregnancy, childbearing and the incidence of STIs. The majority of studies addressed in this chapter reflect research findings that...