The U.S. birth rate fell to a record low in 2011, driven in large part by the economic downturn.
According to a Pew Research Center report, the nation's birth rate fell 8 percent from 2007 to 2010. It dropped 6 percent for U.S.-born women and 14 percent for foreign-born women since 2007. Last year's rate was the lowest since records started being kept in 1920.
A drop in new arrivals to the U.S. also affected the birth rate, with immigration from Mexico reaching a net zero in 2010.
The birth rate is defined as the number of births per 1,000 women, aged 15-44.