Stop laughing long enough to note: the article Reed links to doesn't mention abstinence and the study the article references actually says:
The percentage of sexually experienced teenaged females ever using periodic abstinence, or the calendar rhythm method, appeared to increase from 11% in 2002 to 15% in 2006–2010, but this observed difference was not statistically significant.
Oh, and the states in which Saving It For Jesus classes are taught have the highest rates of teen pregnancy.
Go away, Ralph. Surely there's some Native Americans somewhere that need ripping off.