The U.S. birth rate fell 2 percent in 2008. Here are some facts about births in the United States from the NCHS, part of the Centers for Disease Control and Prevention: 4,251,095 babies were born in the United States in 2008, down nearly 2 percent from the 2007 peak of 4.317 million; the general fertility rate, which measures births among women aged 15 to 44, declined in 2008 to 68.7 per 1,000; The crude birth rate, which refers to births in the total population, was 14 per 1,000, 2 percent lower than the rate in 2007.