Shell-less chick embryo culture
Shell-less chick embryo culture is the process of growing chick embryos in vitro, without their protective egg shells, for scientific observation. Chick embryos and other avian embryos have been used as biological models to visualize the developmental stages of embryos for education and to perform embryological manipulations.
Source: Wikipedia — Shell-less chick embryo culture (CC BY-SA 4.0)