The pro-abortion argument has undergone a variety of modifications over the years, which is generally an indicator of a failed position. First was the "it's-not-alive" gambit, but of course science and logic put the lie to that one. Then came the dehumanization tack, the "yes-it's-alive-but-not-human" canard. Logic blows that one away (if it's not human, what is it, an alien?). The most recent grasp at straws was the non-personhood obfuscation, which anyone with half a brain can see as simply an exercise in newspeak. Now most pro-aborts I talk to kind of (shamefully) admit that that what they are advocating is simply that women have the right to kill an innocent person and have no moral imperative to justify such a decision, and no one else has the moral authority to question it. How that is different from the Nazi position of being justified in exterminating a whole people simply because someone says they can do so goes unanswered.