Most people agree that killing a newborn is a criminal act, not a mother's choice, (although there have been a few people who have defended infanticide). The question in the abortion controversy is whether a fetus is relevantly different from a newborn. Of course there are differences (a fetus is in the womb and a newborn is out of the womb), but the big question is whether that difference is a morally relevant difference, a difference that gives us grounds for thinking that while a newborn has a right to life that should be backed up by the protection of the criminal law, a fetus has no such right.
This is mostly by way of trying to spell out the issue clearly.