A better way to articulate it is: if there is a dire medical situation where the woman's life is in danger and the only way to save her life involves the possibility (or even the probability) of losing the child, then the procedure is permitted. At this point, it ceases to be an abortion (the direct and intentional killing of an unborn human being) but an effort to save the mother's life with the unfortunate risk of losing the child.
Yes. If a choice is necessary, there are people already dependent on the mother