The egg of chick is laid at this stage :

Explanation

The egg of chick is laid at the stage of blastula.A blastula is an early stage of embryonic development in animals, following the morula stage. It is characterized by the formation of a fluid-filled cavity called the blastocoel. The blastula represents the next stage of development after the morula, and it is a precursor to the formation of more complex structures, such as the gastrula and, eventually, the embryo.The blastula is a critical developmental stage in the early embryonic development of animals. In some species, the blastula will undergo further changes and invaginate to form a structure called the gastrula, which is the next step in embryonic development and leads to the formation of the three primary germ layers: ectoderm, endoderm, and mesoderm. These germ layers give rise to all the tissues and organs of the developing organism. The specific details of blastula formation can vary among different animal species.