What could an ethical framework be if not the way you decide what actions to take in order to maximize your values? Obviously consequentialism has nothing to say about what those values are, but it rules out the idea that an act of omission with consequence 'foo', and a proscriptive act also with consequence 'foo', can be morally distinguished.
You are asking extremely basic questions. Try again after you've read the post I linked.
A few years ago, I wrote a little dialogue I imagined between 2 materialists, one of whom was for and one against abortion, centering on the personal identity question. I recently cleaned it up and added a number of references for the biological claims.
You can read it at An Abortion Dialogue.
Early feedback from #lesswrong is that it's a 'nicely enjoyable read' and 'quite good'. I hope everyone likes it, even if it doesn't exactly break new philosophical ground.