Until the baby can survive outside the mother, it isn't a developed to the point I would call it human. After that, I agree with you --that it is murder.
The bizarre aspect of this is that for it to get this far, the woman -- or girl, probably -- went through sex education at school, maybe through some other venue, had counseling on birth control, probably had access to free birth control and day-after remedies, and still got pregnant. So you could make a case that she must have wanted to have an abortion over all else as a matter of choice.
And that would be premeditated murder at some point.