If 1 is reactive, then so is 2.
For a given fetus, there is a finite possibility space of all the persons into which it could develop, taking into account different values of unknown future parameters. The same can be said of any combination of sperm and ova; it's just that the possibility space is larger. How would one derive a concept of "specific" that discriminates between the fetus space and the sperm/ova space without drawing an arbitrary line based on the size of the space?
Do you have an instance of "I proactively do X" where you do not class it as reactive? Do you have an instance of "I wish to avoid Y" where you do not class it as specific? I don't like conversations about definitions. I was using these words to describe a hypothetical inner experience; I don't claim that they aren't fuzzy. You seem to be pointing at the fuzziness and saying that they're meaningless; I don't see why you'd want to do that.
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.