I am a Pro-Choice Christian. I believe that it is the responsibility of the individual to account for their actions before humanity and before God. I do not agree that fetuses are as lifeless as leaves blowing in the wind, however.
The problem with this world view is that it tells humans that we ourselves are just biological groups of cells who innately follow their instincts. The keywords between the liberal and conservative views are Freedom vs Responsibility and Autonomous control versus Obedience to absolute morality.
On the one extreme, we have a generation of church going adult children who are scared to grow up and take responsibility for their own actions. At the other extreme, we have a bunch of self willed adults who think that there is but one life to live and that humans have every right to engage in any sort of free expression that strikes their fancy with no regard to responsibility and consequence.
In summation, I believe that abortion should remain legal. If murder is the cause, there are plenty of murders throughout the planet of adults that deserved a full life. Let the babies lives be the responsibility of Mothers who can freely choose the outcome.