There is, by far, a best pro-abortion choice argument out there: while acknowledging the personhood of the preborn human, a pregnant mother still has the right to kill/unhook her preborn child. Many know this argument from the famous violinist scenario by Judith Jarvis Thomson; many introduction to ethics courses use her argument for abortion debates in class (mine did).
Well, the video series below from Life Report answers the argument to an extremely high degree. (I have an article I'm working on that goes beyond the ideas in this video, but I'll disclose that later.)
Please take the time to listen to the videos in their entirety.