From Kirby et al. (2007)

  % of studies (out of 83) finding various

  outcomes of sex education programs

Condom use

  Decrease           0%

  No effect         52%

  Increase          48% 

Sexual risk-taking

  Increase           0%

  No effect          50%

  Decrease           50%

Pregnancies

  Increase            8%

  No effect          69%

  Decrease           23%

Age of first sex

  Earlier           2%

  No effect         56%

  Later             42%