Seems the abortion-crime link folks are at it again. For the sake of argument, assume they're right. So what? Execute every violent felon immediately upon conviction, and you'll find a strong link between your public policy and the crime rate. Do as Franco did and make criminals of all stripes disappear, and you'll find a strong link between your policy and the crime rate. Hell, just chuck the Bill of Rights and you'll see a very nice drop in the crime rate.
There's a simple way to characterize abortion as a crime-prevention measure. It is preventive execution.