Out of the 1,700 unmarried, heterosexual teens between 15- and 19-years-old that participated in this study, about two-thirds of them had been through comprehensive sex ed programs (which included learning about sex, birth control methods, and STIs). One-quarter were taught "abstinence only," and 10 percent received no formal sex ed. This study found that 60 percent of the teens who had received extensive sex ed were less likely to have become pregnant or get someone else pregnant. This study also showed that thorough sex education was much more effective at preventing teen pregnancies compared to sex ed programs, which taught teens to just say no to sex.
This is great news for people who may think talking about sex will make teens want to go out and do it. Kids are going to be having sex whether you talk about it or not, so we as adults have the responsibility to educate kids about how to protect themselves against STIs and prevent unwanted pregnancies.