-
Period: to
Infancy: Newborn
Stage one of infancy; birth to one month old -
Infancy: Newborn
1 day old -
Period: to
Infancy: Infant
Stage two of infancy; one month to one year old -
Infancy: Infant
6 months old -
Period: to
Childhood: Early
Stage one of childhood; one to six years old -
Childhood: Early
About 3 years old -
Period: to
Childhood: Middle
Stage two of childhood; six to eight years old -
Childhood: Middle
About 8 years old -
Period: to
Childhood: Late
Stage three of childhood; nine to twelve years old -
Childhood: Late
About 11 years old -
Period: to
Youth: Preteen
Stage one of youth -
Youth: Preteen
13 years old -
Period: to
Youth: Early Teen
Stage two of youth -
Youth: Early Teen
14 -
Period: to
Youth: Middle Teen
Stage three of youth -
Period: to
Youth: Late Teen
Stage four of youth -
Period: to
Adulthood: Young
Stage one of adulthood -
Period: to
Adulthood: Mature
Stage two of adulthood -
Period: to
Adulthood: Aging
Stage three of adulthood