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yeah, that's right, it doesn't, which is probably good since a fetus has no agency.

I don't know what you mean by agency in this context.

the ability to make choices for oneself

Neither does an infant. I don't think that means they should be killed at will though.

an infant is not stuck inside of anyone against their will.

But an infant is just as dependent on its parents outside the womb as in. Harder to take care of even.

Not really, anyone could take care of them, they can breath on their own.