You know full well that there is no scientific proof that could convince you. We already know what is going inside the growing embryo, that it is genetically human and on its path to mature adulthood then death. That course has already been set. It has no more of a say about its survival than a 1 month old or even a 6 month old, both of which are every bit as dependent on another human for life as the fetus is, and both of which we regard as "beings".

The only proof you could be talking about is scripture/revelation of God's will. And I doubt you want to base a law on scripture, after all how dare you force your religious beliefs on somebody else. You won't accept what the church father's have said, though you no doubt accept the creeds. What could change your mind?