<P> The term childhood is non-specific in its time span and can imply a varying range of years in human development . Developmentally and biologically, it refers to the period between infancy and adulthood . </P> <P> In common terms, childhood is considered to start from birth, and as a concept of play and innocence, which ends at adolescence . </P> <P> In the legal systems of many countries, there is an age of majority when childhood legally ends and a person legally becomes an adult, which ranges anywhere from 15 to 21, with 18 being the most common . </P> <P> A global consensus on the terms of childhood is the Convention on the Rights of the Child (CRC). Childhood expectancy indicates the time span, which a child has to experience childhood . </P>

What do we call the developmental stages from birth to death