"Some religions insist on the sexual abstinence before marriage. Isn’t it ironic that the journal Reproductive Health reports a correlation showing that the more religious the state, the higher the rates of teenage pregnancy?
Salon.com, Bernard Starr, Jan 8, 2012
Here's from the report by Reproductive Health:
With data aggregated at the state level, conservative religious beliefs strongly predict U.S. teen birth rates, in a relationship that does not appear to be the result of confounding by income or abortion rates. One possible explanation for this relationship is that teens in more religious communities may be less likely to use contraception. "
Religiosity and teen birth rate in the United States, Joseph M. Strayhorn and Jillian C. Strayhorn
See full report here.
Teen birth rate by religiosity