Lower birth rates could impact the future of social programs in the United States.
The U.S. Fertility Forecast shows births are at their lowest levels since 1920. Analysts say immigration and the recession have driven the national fertility rate below the two children expectancy.
The slowdown is causing concern because the gap between people who fund social programs and the elderly who depend on them is growing.
The Charlottesville company Demographic Intelligence says it is unclear if births will bounce back with the economy.