I don't think this will effect abortion in any way, as the two situations are much too different. For abortion, the mother is responsible for the life of her baby and the decision rests with her on whether to terminate the baby or keep it. There are restrictions on whether she can get an abortion or not, and it must be performed by a doctor that is legally able to do such procedures. In this case, a man killed a woman, resulting in the unwanted death of her child. No real parallel.