Which term is used to describe the groupings of infancy early childhood and middle childhood?

The term used to describe the groupings of infancy, early childhood, and middle childhood is developmental stages.

These stages are often used in developmental psychology to categorize the different phases of human development, each with its own set of characteristics, milestones, and challenges.

Here's a breakdown of how these stages are often grouped:

* Infancy: Birth to 2 years

* Early Childhood: 2 to 6 years

* Middle Childhood: 6 to 12 years

While other terms like "childhood" or "early development" might be used, "developmental stages" is the most specific and accurate term to describe these specific age groups.