Culling newly hatched male chicks in industrial hatcheries poses a serious
ethical problem. Both laying and broiler breeders need males, but it is a
problem because they are produced more than needed. Being able to determine the
sex of chicks in the egg at the beginning or early stage of incubation can
eliminate ethical problems as well as many additional costs. When we look at
the literature, the methods used are very costly, low in applicability,
invasive, inadequate in accuracy, or too late to eliminate ethical problems.
Considering the embryo's development, the earliest observed candidate feature
for sex determination is blood vessels. Detection from blood vessels can
eliminate ethical issues, and these vessels can be seen when light is shined
into the egg until the first seven days. In this study, sex determination was
made by morphological analysis from embryonic vascular images obtained in the
first week when the light was shined into the egg using a standard camera
without any invasive procedure to the egg.

在研究中通过无侵入的方法，对鸡胚在孵化的第一周通过血管成像来进行形态分析以实现早期性别鉴定，从而消除道德问题和降低成本。