Abortion is definitely murder. It's self centered thing to do... even if the mothers life is at risk.
I used to be pro abortion to honest. I converted to the other side when I met a child of my relation whom I advised to be aborted when his father sought my opinion concerning his unexpected pregnancy.
I was filled with guilt when the child, who is now grown, starred at me. I immediately remembered my advise to his father and I was too shamed to lift him up. I was filled with guilt and very confused at that moment.
I think what should happen if either the mother's or unborn child's life is at risk is to try save both of them and not try to murder one for the sake of the other. I strongly believe if more effort is put into saving the two, scientists will quickly come up with solutions for saving both mother and unborn rather than murdering/sacrificing one.