America is quickly going the way of Japan.
Mostly poor mexicans, blacks, and some poor white people are having kids. Mexicans especially, they're on the rise and are having 3+ kids usually.
Most good looking white women who have things going for them do not want to settle down, same for white men. They don't want kids and are mostly focused on their own lives, careers, goals, etc. A lot of times when these women are around age 35 and have been used up they will try to find a guy to marry them and pop out maybe one or two kids.