the right to abortion is just a subset of bodily autonomy: noone should be able to make decisions or take actions upon your body except you/with your consent.

you can survive with half a liver, and livers regenerate. you can also donate significant amounts of your blood, and even more plasma, without ill effect. these things are lifesaving, but despite that, you cannot be forced to do so against your will.

abortion is no different. just because it can't survive without you doesn't mean it gets priority over your own bodily autonomy.