Nice idea, but you've waited until the horse is well out of the barn already. You aren't addressing the male half of the equation and male behavior, just the consequences in the woman's body.
It's funny how people treat female pregnancy as if it's some sort of black box situation where oh, she's knocked up, how in the world did that happen. A man made it happen. Oh, she didn't keep her legs closed. Great, but now how many modern men expect all women of childbearing years to be practicing contraception of one form or another, and to be fully sexually available during "dating" (I guess courtship is dead).
Yes. Pretty much. And there are many reasons for it. I remain single because of the marginal cost analysis of getting involved in a human pair-bonding situation. Not a good investment.
/johnny
With respect to the problems of the black underclass, none of them are solvable by imposing sanctions on black males. The ones impregnating the most women are the thugs who will most likely be killed by other thugs before the kids they conceive are in their teens. They have no assets to be seized, and no garnishable income to be grabbed for child support.
The only side upon whom sanctions can work, are the women.