There are three things we have to remember. Fetus's don't have full sentience. Fetus's aren't capable of using reason. Fetus's don't have instinct. The only justification for keeping abortion illegal, is that fetus's have a soul, and that's a religious argument.
A fetus ( until it has brain function ) is just an organ of the mother . And in many cases could hurt the mother .Can someone not remove thier appendix because it could hurt them , Can they be charged with murder ?