It can't be "not murder" when the expectant mother does it and murder when the forced aborter does it without holding two opposing beliefs at once.
I'll say the crime might be theft and possibly assault to a pro abortion person and the crime would be murder to a pro lifer.
I say possibly assault to the pro abortion person, since an abortion can presumably be done to a willing person without committing an assault on that person. If the forced abortion is done precisely and exactly as a non forced abortion would have been done to the pregnant woman, a claim could be made the woman was not assaulted in either abortion instance.