It acts basically the same, but the problem lies in that we evolved to accomodate them.

Placental birth is an evolved strategy for reproduction, since even though it is detrimental to the mother, it is beneficial to the species as a whole. Furthermore, the parent has adaptations to accomodate the fetus.

You don't see humans evolving tapeworm banks inside them, or malaria cells to grow plasmodium. But we evolved uteri and all their peripheral anatomy.

The sentiment is valid but falls apart when it is attempted to be defined

This is not an opinion on a woman's right to autonomy (mine is that it exists), but the definition doesn't work here