The rate of babies born in the United States hit a record low in 2011, a new analysis shows. Researchers say the drastic drop in the birth rate among immigrants has greatly contributed to the overall decrease.
Based on preliminary data from the National Center for Health Statistics, the Pew Research Center calculated that the overall birth rate — the annual number of births per 1,000 women between 15 to 44 — was 63.2 last year. That's the lowest since such reliable record collection began in 1920 and close to half the birth rate in 1957, amid the Baby Boom years.
For the rest of the story: http://www.livescience.com/25140-us-birth-rate-hits-new-low.html