Chick embryos can be ‘woken up’ in the egg long before hatching by rousing them with the sound of clucking hens. Other noises have no effect - only the clucking of a hen.

Real-time visualization of chick embryo development from egg to chick. University of Tsukuba. Journal Scientific Reports DOI 10.1038/s41598-024-72004-y ...

A new method to grow chicken embryos without their opaque eggshells could lead to direct observation of bird development as well as advances in stem cell research, scientists say.

“CULTIVATION of Viruses and Rickettsiæ in the Chick Embryo”, by W. I. B. Beveridge and F. M. Burnet (Med. Res. Coun. Spec. Rep. Ser., No. 256, 1946. H.M ...

Tiny Amounts of Plastic Cause Horrifying Problems in Chicken Embryos "We see malformations in the nervous system, heart, eyes and other parts of the face." 3.25.23, 2:02 PM EDT / Maggie Harrison ...