Not a huge deal. More and more young married working couples are focusing on their careers and not having kids. I frankly don't blame them when work takes up most of ones time. No time to raise kids then don't have them is the growing trend.
No a lot of young married couples can't afford to have kids. Young people aren't settled enough to afford to get married let alone have kids. It's the economy over the last decade. The high population areas on the coasts are so expensive no one can breathe, but that's where the jobs are.
It has nothing to do with white or not.