Abstinence-Only Education Is Ineffective And Unethical, Report Argues -- They don't succeed in reducing rates of teen pregnancies or STDs. Moreover, public health data indicate that such programs "have little demonstrated efficacy in helping adolescents to delay intercourse"

See the source article by following the link below:
Abstinence-Only Education Is Ineffective And Unethical, Report Argues -- They don't succeed in reducing rates of teen pregnancies or STDs. Moreover, public health data indicate that such programs "have little demonstrated efficacy in helping adolescents to delay intercourse"