I am pro-life, and I will be damned if some man will tell me I have to have an abortion because he doesn't want my child. If he doesn't want it, its NOT his child. And I will use the its my body argument to defend my stance, the pro choicers do, so why don't I have that same right? As for the dad not having a say in the child living, thats just one of the tragic side effects of abortion. To some women, nine months feels like forever I guess, and they don't want to have to deal, I would assume? I have never had an abortion, never will, so its hard for me to say.
*edit* And this is assuming we are talking about two adults making these decisions, if its a 13 year old girl, then I would never judge her for making that choice, whether or not daddy wants to be involved. I would never judge an adult either, its not my place, but when they are that young, it really becomes a shade of grey.