"could you tell me when you believe "exercising autonomy" over her own body stops and an abortion becomes an act of aggression"
Imo, birth.
Had I been aborted because of the reasons proponents present, being an intelligent, capable individual, I would accept it. I'd even go farther and appreciate it. If fetus' could acknowledge such reasons, I believe, the majority of them would also accept it. Why would you want to be born into an overpopulated world that does't have the ability or resources to support you or a family that doesn't want you?
I believe, this viewpoint, comes from the 'life is precious' perspective, when in reality, it isn't. That's not to say if you accept it is, and you want to keep your kid, it isn't, just that not ALL life is. Life.. is.. inevitable. To support it under all circumstances, even under such instances as poverty, seclusion, abuse, and neglect, is inhumane to say the least. Consider a puppy.. is THIS right, humane?;
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What about this?
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Or this...?
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