They want the majority of women and children in their relative areas to be impoverished and too poorly educated to do skilled labor so that they can build a base of workers who can compete with unskilled immigrants and/or function as slaves. That’s my angle because “we just want to kill women” is something you don’t need to pass a law to do, and frankly you shouldn’t be worried about laws if that’s your intention. On the other hand, “we want to pass a law that partially criminalizes pregnancy so that we can imprison and profit off of marginalized women” sounds about right.
I do think a lot of them personally seem to have a very pronounced sadistic fetish for maternal death in childbirth though.