What is the name of the process of individual development of an organism from the moment

What is the name of the process of individual development of an organism from the moment of fertilization to the end of its life?

This process is called ontogeny. It includes all stages of intrauterine development, as well as life outside the womb. Ontogenesis ends with the biological death of the organism. This period may differ for each animal. It all depends on many different environmental factors, individual characteristics of the organism, the quantity and quality of food, and so on. Some animals, which live an average of 15 years, in zoos could live twice as long and still feel good.