Interesting question. Obviously an unborn child doesn't need clothing or toys yet, but they would have healthcare costs, which could run quite high. My gut reaction is 'yes, but not to the same extent as post birth', but its not a thought out position.
Would this be enforceable in practice? You'd have to go from conception to relationship breakdown to court orders in nine months, and there would be paternity issues in a sizable percentage of cases. Family court doesn't seem to work that fast, at least where I am.
Well, healthcare costs and its probably more expensive to live when you are pregnant, am I wrong?
It's primary goal wouldn't just be to preserve familial resources for children but also to make both parents share in the burdens of extended personhood.
If abortion were made illegal, I would also have the father be punished as an equal accomplice to the mother unless he files a police report within a week of the alleged abortion.
Though, the punishment of the parents would be sterilization (instead of jail/prison/supervision) or something like that.
I am thinking ahead to where pro-choice people are basically in the position of anti-abortion people are today. Basically, I would chip away first without actually fighting the actual ban. I would just try to make enforcement less discriminatory.