White female adolescents participating in the ADD Health Study were asked how often they attend church, and if they've ever been pregnant.
Percent ever pregnant (N = 657)
Never attends 16.5
Less than once a month 17.8
At least once a month but not weekly 10.6
Weekly or more 12.9
The differences are not statistically significant (meaning we're not sure that they're not an accident of the sample). These findings do not support the contention that religious girls are the ones who get pregnant.