It is her body upon which the pregnancy depends, and if she is not able to govern it, she has no autonomy in the situation.
But she's almost certainly brought in another person to perform the abortion. What about the self governance of the doctor? Forget the fetus-- you can't talk self governance when there's at bare minimum
two parties involved and one of them is actually performing the abortion. If we're worried about "self-governance", we can strictly legalize DIY abortions and that'll be the end of that.
I've already explained why DNA is insufficient to define what it means to be a human being. Identical twins have identical DNA, yet this clearly doesn't mean that they are the same person.
But they're nonetheless distinct existences from the parents because of their DNA, and thus cannot be considered mere extensions of the mother. The fact that they have human DNA, and are generally capable of growth into a more mature human being, substantiates their humanity.
Similarly, if someone was to undergo some kind of radical genetical mutation, they wouldn't suddenly become someone else.
If, perchance, someone had undergone a massive genetic mutation that changed the DNA in every cell, they
would be a different person. Actually, this thought experiment is undercooked-- what do you imagine the consequences of changing the DNA in every cell of a single person would be on their body, psyche, and the developmental trajectories of the aforementioned?
Our DNA is not what defines us as people, our individual conscious experience and identity does
You can very well argue whether someone that isn't you has either of those things-- for example, African slaves were considered subhuman in order to justify their enslavement in America when slavery became fashionable again but people had come to understand that "all men are created equal" includes...
all men. They came up with a variety of arguments in order to assuage their cognitive dissonance, but it really is as simple as not regarding a human being as a human being. You can't argue with biology and ontology the same way-- you can't call a banana a dolphin because... well, a banana doesn't look like a dolphin, it doesn't have dolphin DNA (and thus it is never destined to grow into a dolphin), and at no point in a banana's evolution is a dolphin ever involved.
Identity, furthermore, is more fundamental than you're making it to be. Identity is as simple as defining a separate existence. A fetus is dependent on the mother, certainly, but that doesn't make it of the same existence of the mother.
Conscious experience certainly does factor into the definition of a human identity, but at the foundation of what defines a human must lie immutable, undeniable factors-- even without awareness of DNA, you can mate with another human being and produce offspring that are undeniably human. Everyone in that occurrence, therefore,
must be of the same kind, and furthermore, they must have
always been of the same kind.
The difference is that someone who is asleep is already a human being. They're not a potential person, since their potential has clearly been realized.
Actually, their potential has yet to be realized since they have yet to reach maturity. You speak elsewhere of children being less cognitively developed than adults, but the developmental difference is global-- they're less developed in every single capacity. Given that assertion of yours, the blind spot of this assertion, and your belief that "conscious experience and identity" (rather than biology and ontology, with or without "conscious experience and identity") leads me to believe that you take a rather "mentalized" approach is evaluating human life.