It would all depend on the circumstances. If the mother's life was in danger, then I'm all for aborting it. Hell, I'd abort it twice if I could. Otherwise, I would consider it morally wrong. Again though, this is an attempt to use a tiny fraction of procedures to attack what is otherwise a godsend to women everywhere.
You are also freely wheeling back and forth between the legal definition of murder and the moral definition of murder. Defending something in a legal sense and defending something in a moral sense are frequently very different things. It could certainly be a legal procedure, as fetuses are not legally people, and at the same time be a moral offense.
Question: If it is not legally a person what legal basis does the state have to charge and convict people of 2 murders for killing a pregnant woman who at that point in her pregnancy could have legally aborted the fetus.
Disclaimer: I am not taking a side in the entire abortion debate, simply asking a, imho, reasonable question. If it isn't a person then it isn't murder, it its murder then its a person.