Life is something much more precious and astounding that just a sum total of the proteins that we can transcribe. Both of these factors definitely bring the fetus closer to being a human, but insects also have these characteristics. Surely there is something more than this that makes one human. But the simple fact is that all definitions are imperfect. And yet, as we established, we must have one.
Society has a responsibility to the fetus, but society also has a responsibility to the mother.
But as soon as the fetus is viable, its destiny should no longer be completely dependent on that of the mother. And so, imperfectly, this is where society draws the line. It would be a tragedy for a women not to know all the options open to her. It seems that pro-life supporters conceptualize women that have abortions as unfeeling and promiscuous people that don't care enough for the life growing inside them. This is unfair.