Honestly I've never quite gotten the ppl that are prolife but have exceptions. If I understand it, you're prolife because you think that every baby has a soul & plan that is designed by god. So, he must already know that the pregnancy will be terminated & maybe that is his plan or are we able to muck up his plan because he doesn't know? If he does know then rape, incest, life of the mother are part of his plan & there should be no exceptions, let the cards be dealt (the dealer is cheating).
@chuck34108 in Catholicism at least you've got the doctrine of "original sin"--the default destination for a soul is hell b/c it's tainted by original sin.
To escape that fate you've got to be baptized. Once you develop morally to the point where you can be held responsible for your actions you've also got to not sin, or seek forgiveness when you do.
(I am very much not defending this view--just explaining what I was taught as a child)