Children from racial and ethnic minorities now account for more than half the births in the US, according to estimates of the latest US census data.
Black, Hispanic, Asian and mixed-race births made up 50.4% of new arrivals in the year ending in July 2011.
It puts non-Hispanic white births in the minority for the first time.
Sociologists believe the ongoing economic slowdown has contributed to a greater decline in birth rates among white people.
The US Census Bureau recorded 2.02m babies born to minorities in the year to July 2011, just over half of all births, compared with 37% in 1990.