"Some studies on avian claim that glucocorticoids especially corticosterone which is the main glucocorticoid in avians as well, are deposited in the yolk during the egg formation because of elevation of plasma glucocorticoids. It has been hypothesised that this deposition has a negative impact on embryos development and survival"...
https://www.vetmeduni.ac.at/hochschulschriften/diplomarbeiten/AC09597860.pdf
https://www.vetmeduni.ac.at/hochschulschriften/diplomarbeiten/AC09597860.pdf
