The Daily Mail reports that the face of the U.S. is changing rapidly in the delivery room.

America is reaching a ‘tipping point’ when the babies born to minority parents outnumber whites for the first time.

More white women than ever before are postponing having children until they are older, while minority mothers are still having babies at younger ages, according to a US study published yesterday.

Experts claim the immigration boom has accelerated the historic trend that is likely to leave whites in the minority in America by the middle of the century.

The percentage of children born to minority parents has grown significantly  in recent decades, but this study projects that more than half will be to minority parents this year.

One of the study’s authors, a sociologist, weighs in:

‘For America’s children, the future is now,’ said Kenneth Johnson, a sociology professor at the University of New Hampshire who researched many of the racial trends in the report.

‘Census projections suggest America may become a minority-majority country by the middle of the century,’ he added.

He explained that there are now more Hispanic women of prime childbearing age in the US, who tend to have more children than women of other races.

More white women are waiting until they are older to have babies, although it is not yet clear how much effect that will have on the current trend of increasing minority newborns.

The number of white women of prime childbearing age is on the decline, dropping 19 per cent from 1990.

Broken down by race, about 52 per cent of babies born in 2008 were white.

That’s compared to about 25 per cent Hispanic, 15 per cent black and 4 per cent Asian. Another 4 per cent were identified by their parents as multiracial.

What will the significance of this trend be? The Daily Mail speculates…

The numbers highlight the nation’s growing racial and age divide, seen in pockets of communities across the US, which could heighten tensions in current policy debates from immigration reform and education to health care and Social Security.

There are also strong implications for the 2010 population count, which begins in earnest next week, when more than 120 million US households receive their census forms in the post.

The Census Bureau is running public service announcements this week to improve its tally of young children, particularly minorities, who are most often missed in the once-a-decade head count.

Whites currently make up two-thirds of the total US population, and recent census estimates suggest the total number of minorities may not overtake the number of whites until 2050.

Right now, roughly one in ten of the nation’s 3,142 counties already have minority populations greater than 50 per cent.

But one in four communities have more minority children than white children or are nearing that point, according to the study, which Mr Johnson co-published.