I'm making the matrix reference so you don't have to.

Fetal lambs lived for weeks in a fluid-filled bag. Tests to help premature babies could begin in 3 years. The device, eyed as an improvement over incubators, kept fetal animals alive using a sterile, temperature-controlled plastic bag filled with amniotic fluid.

2022-06-02: Given that most countries are now below replacement fertility rates, we should be strongly in favor of Ectogenesis, on top of many other good reasons.