This is incorrect. Completely false.

First, this research confuses "country" with "society". The USA is not a society. It's a country. Within a country there are multiple societies. Without knowing the religious beliefs of the convicted murders or pregnant teens, you don't know to which society they belong; therefore, your research is inconclusive at best. Also, because a persons belief system is subject to change over time, you would have to know what their beliefs were specifically at the time of the homicide or intimate act.

More food for thought: One of the major contributing factors to teen pregnancy in the U.S. is the depiction of sex in the media. Sex is everywhere on TV. Sex is used to sell clothes and news. It's in television shows - even those gears towards teens. Who controls the media in the U.S.? I promise you it's not a bunch of faithful Christians. Generally speaking, the media is liberal.