How come in the United States a woman can murder her baby on the government's terms, but not her own terms?

If a woman gets an abortion and murders her fetus it's fine, but when she kills her newborn, she gets jailed. Like literally, a fetus is just as much a living, breathing child as is a newborn.

On the flip side, one can argue, it's just a baby, so the woman should go to jail, but not for life. Less, much less.

Why are the pro-choice people okay with killing fetuses, but not newborns, when it's literally the same thing.

How come in the United States a woman can murder her baby on the government's terms, but not her own terms?
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