Watch this if you want some insight into the crux of the anti-abortion question.
Anna Quindlen has a great column in the current Newsweek based on this YouTube clip. She concludes: " ... there are only two logical choices: hold women accountable for a criminal act by sending them to prison, or refuse to criminalize the act in the first place. If you can't countenance the first, you have to accept the second. You can't have it both ways."
Addendum: apparently, the embedding of this video has been disabled. If the link above no longer works, try to cut and paste this link: http://www.youtube.com/watch?v=Uk6t_tdOkwo or google "Libertyville abortion protest."