This question is unanswerable because nobody can define what is human and what is life. It's a spectrum. For any rule you can give that separates humanity from

This question is unanswerable because nobody can define what is human and what is life. It's a spectrum. For any rule you can give that separates humanity from other animals, I can give an exception to that rule. Which is why intellectualizing the abortion argument from the point of "when does life begin" is pointless. Instead we should serve to minimize harm, in which case legalizing abortion is the obvious choice, since criminalizing abortion has never decreased the number of abortions. It has only led to unsafe abortions and higher rates of infanticide.