>>13871663Ignoring the emotional difficulties with women growing a child inside them made for harvesting with all these hormones encouraging attachment to it (I'm not starting a conversation about whether or not it's a person, I'm just saying it's emotionally difficult, to put it very lightly), most of them are stillborn and most of those that survive birth don't last for more than a couple of hours, so I suspect it's not very practical and what little does come out of it is only relevant for organs appropriate for very newborns (though admittedly I don't know the age range for which a newborn's organs are a viable option).
Came across this thing about an Anencephalic 2 year old
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5093842/which is interesting in it's own right and also illustrates the biggest problem with that idea, parents grow attached to their children regardless of what position they're in and even if they have the organ necessary to be considered a human person.
These parents had a child which was supposed to die any minute now and was arguably little more than a pile of meat and instinctual reactions and they still took care of it as though there was something to salvage there.
If nothing else the public wouldn't tolerate the idea of "baby farming" and of the parents that would agree to be a part of such a program I suspect most of them would experience psychological difficulties with giving birth to a malformed freak sent to the meat grinder.