You cannot be forced to donate a kidney to save someone else's life: they have no claim on your body. You cannot be forced to donate blood, for the same reason.
You cannot be forced into surgery. You have the right to refuse medicine. And, in general, you have the right to ingest whatever substances you want, even though the substances may be illegal to possess or sell.
Nevertheless, all of the above is useless, because the people who want to ban abortion are not, in general, sincere about saving humans life being their primary desire. Their primary desire is to have a subclass of humans who can be controlled and punished. Arguing with them about this is approximately useless; there are a few who are willing to discuss evidence and logic, but most are only displaying their allegiance to their tribe.