Teen pregnancy is heavily studied, it is big social issue. It has pretty large impact on mother, child, father and extended family. The articles I have seen strongly associated sexual education with both less sex and safer teenage sex.
Basically, if you teach kids about sex and anticonception and condoms, they are less likely to do it and more likely to use this condoms and generally behave more safely.
On the other hand, abstinence only education is associated with more pregnancies.
