Ironically, many people seem to think that the SCOTUS reached approximately the right "place" on the spectrum in Roe vs Wade while using abominable reasoning ("emanations" from "penumbras" still rankles!)
Sadly, most states were already moving that way anyway, and had SCOTUS not intervened, we'd probably be pretty much where we are now anyway, except without all the rancor. it's amazing how important process can be in legitimizing the results!
Nearly 100% consensus: if a woman waits until the moment right at which the baby is born, killing it is murder or manslaughter.
nearly 100% consensus: life does not "start" at conception, life can only start at the earliest after a fertilized egg implants itself in the uterine wall. Akin's apparently bizarre statement (which I do not support) hinted at this: women might create stress hormones that eject the fertilized egg before it implants. You'd think then that he also would support the "morning after" pill / injection as well (when I was in college, the morning after certain campus events, you'd see a steady stream of young women heading toward the university health service for the injection, which was quietly available in the 1970s).
Then as you move from either end, either backward from birth (okay, killing a fetus which would be viable on its own outside the womb is tantamount to murder) or forward from implantation (suppose the egg does implant but insufficient cell division has yet occurred for the nascent life form to be recognizably human), more and more people drop out from either extreme until you reach a middle ground at which most people grudgingly compromise.
The widespread availability of ultrasound is probably the pro-life person's best friend; once you see that little heartbeat, the whole conversation moves dramatically from the abstract to the concrete.
I am certainly sympathetic to a woman who says "hey I don't want to be carrying that 'thing' around inside me." it's a real heart-breaking choice: "get rid of 'that thing' early? or subject it to years of child abuse later?"
Every woman I know who's had an abortion suffers regrets, even when they knew rationally it was the 'right thing to do.'
It's weird though how some men get so passionate about it. Unless it were my sperm involved, how much voice do I deserve to have in the decision?