Like a pure individualist, you're using "the community" like it's a dirty word. There's no individualism without a community of individuals to stand up and defend the individual. Often the individual is the enemy of individualism and the community is the champion of individualism. This's how it should be. Your best argument is the undeveloped hunan in the womb is not yet an individual and thus has no individual rights. I don't have a non-theological argument against that.