Description: The term ‘zygotic’ refers to everything related to the zygote, which is the cell resulting from the union of an egg and a sperm during the fertilization process. This process marks the beginning of the development of a new organism, as the zygote contains all the genetic information necessary to form a living being. From a biological perspective, the zygote is a diploid cell, meaning it has two sets of chromosomes, one from each parent. As the zygote divides and develops, it becomes an embryo, going through various stages of development that are fundamental for the formation of the tissues and organs of the organism. In the field of developmental biology, the study of zygotes and their development is crucial for understanding processes such as cellular differentiation, developmental genetics, and the molecular bases of diseases. Research in this area can provide valuable insights into genetic inheritance, evolution, and the implications of mutations in embryonic development. Thus, the term ‘zygotic’ not only refers to an initial stage in the life of an organism but also encompasses a wide spectrum of studies and applications in biology and medicine.