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To avoid reliance on a living output, perhaps synthetic red blood cells would be used in such a fluid.

https://www.acs.org/content/acs/en/pressroom/presspacs/2020/...

Any idea how it would interface with the placenta? Normal mammals use umbilical cords.

Maybe a cannula would be attached at a certain point? I think the real difficulty would be producing nutrients and mixing them into the blood. I am clearly a nonexpert.

I brought this up thinking about the broader "chicken and egg" ethics & scaling problem of tissue growth. Currently the biotissue alternative meats are dependent on fetal bovine serum to get started. A vegan might object to these meats.

I don't personally support these methods, and am just spitballing ideas on the tech side of the aforementioned problem.

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