Abortion is inherently different from other medical procedures, because no other procedure involves the purposeful termination of a potential life.
Potter StewartThe equal protection standard of the constitution has one clear and central meaning - it absolutely prohibits invidious [repugnant] discrimination by government...Under our Constitution, any official action that treats a person differently on account of his race or ethnic origin is inherently [by nature] suspect and presumptively [probably] invalid...Under the Constitution we have, one practice in which government may never engage in the practice of racism - not even "temporarily" and not even as an "experiment."
Potter StewartI shall not attempt further to define the kinds of material I understand to be embraced within that shorthand description (of pornography), and perhaps I could never succeed in intelligibly doing so. But I know it when I see it, and the motion picture involved in this case is not that.
Potter Stewart