I wouldn't go so far as to say that the Bible is pro-choice (at least not for women) but it turns out that it is explicitly against the proposition that life begins at conception. Exodus 21:22 says:
“If people are fighting and hit a pregnant woman so that she miscarries but there is no serious injury, the offender must be fined ..."
So killing a fetus should be punishable by nothing more than a fine.
That should be game, set and match in the debate over whether abortion is murder, but of course it won't be because religion is not about truth, it's about feeling good, so as long as fighting for "innocent unborn children" feels good, no amount of logic nor the Word of God will deter the anti-choicers from their fix.