A Novel Shell-less Culture System for Chick Embryos Using a Plastic Film as Culture Vessels https://www.jstage.jst.go.jp/article/jpsa/51/3/51_0130043/_a...
An extra-uterine system to physiologically support the extreme premature lamb https://www.nature.com/articles/ncomms15112
Assessment of extremely premature lambs supported by the Extrauterine Environment for Neonatal Development (EXTEND) https://pmc.ncbi.nlm.nih.gov/articles/PMC11772227/
4H is gonna be wild in 5 years.