Sam,
In my opinion there is no difference between a fetus aborted after the point of viability and murdering a baby after birth. They both have a right to life that trumps all other rights of all other people.

The difference between a fetus aborted before the point of viability and a fetus after that point, or a baby already born; is that the mother has a right to privacy prior to the fetuses’ point of viability, but not afterward. She is the steward of her unborn baby; she answers to God but not to man before the point of viability. Her right to privacy trumps the baby’s right to life up to the point of viability, but her fetus’s right to life trumps her right to privacy afterward because at that point the fetus should be considered his/her own steward of life.

A woman who aborts her baby before the point of viability commits a sin but not a crime – unless she was raped or the fetus threatens her life – and then it is not a sin or a crime.

A woman who aborts her baby after the point of viability commits both a sin and a crime – unless the fetus threatens her life.