I'm not asking this to rain on the parade - I love what these guys are doing but I have a question about their process and the ethics of it.

So in order to grow the meat, they have to culture the cells in bovine fetal serum, which they get from cow fetuses on their way to slaughter. My question is how much meat is grown per fetus?

> Cell-grown meat, I told him, would be spurred on by synthetic serums refined from the crude system currently used, where cells are bathed in fetal bovine serum. The serum, which promotes cell growth, is collected from the hearts of calf fetuses found in pregnant cattle gone to slaughter.

https://www.theguardian.com/food/2019/mar/14/impossible-burg...