I do not think that this is a black and white issue, so here would be my plan:
1) Ban abortions after 24 weeks from conception (the approximate time when mental activity commences).
2) Abortions should be free. The same goes for vasectomies and tubal ligations.
These will not only protect the lives of unborn children who are medically alive, but also help prevent unwanted births. I do realize that this does not protect all unborns based on what is theologically alive, but we do not live in a theocracy. This also does not protect what is biologically alive, as that would be rediculous. (Sperm and eggs are biologically alive). So, the medical disctinction of life is the best choice for legal purposes.