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The early child period is considered to be the most important developmental phase throughout the lifespan.
For information on parenting and child development of preschool children (early childhood aged 3 to 7, please visit our Early Childhood Parenting and Child Development topic center. For information on parenting and child development of middle childhood children (ages 8 to 11), please visit our Middle Childhood Parenting and Development center. For information on parenting adolescents (ages 12-24), please visit our Child Development Theory: Adolescence topic center and Parenting and Child Development Theory: Adolescence topic center. When babies arrive in the world, they are tiny, helpless people who depend entirely on adults to take care of all their needs and wants.