I wish Akin had had it thought out this well. One would hope that within the time-span of his whole political career, he would have anticipated such a question and prepared a short but memorable sound-bite. Not easy, maybe, but here's one attempt:
"Think of the three parties involved: the rapist, the raped woman, and the newly-begotten baby. Which one committed a crime of violence? Which one deserves to forfeit life or liberty for this crime?"
Better yet, he should take 5 minutes to become acquainted with a person conceived by rape ---Youtube has a bunch of videos of people like this (Link) --- and lead off my saying, "I listen to women. I heard the testimony of Rebecca Keissling, who was conceived by rape. Yes, she was that baby. It's a terrible thing too be raped, but a baby is still a beautiful life. Ask a woman who knows. Ask Rebecca Keissling."
That way you're putting the focus on a person, a reality, and not just a "political opinion."
Point taken, and very well made.
Thanks!