The developmental milestone by the approximate age in months: 1-2 months, holds head up without support; 5-6 months, sits with back support; 8-10 months, begins to drink from a cup; and 11-12 months, has several teeth and good control over chewing ability.
Developmental milestones are a set of functional skills or age-specific tasks that most children can do at a certain age range. Skills such as taking a first step, smiling for the first time, and waving “bye-bye” are called developmental milestones. Children reach milestones in how they play, learn, speak, act, and move.
Milestones generally are categorized into five major areas, those are: physical growth, cognitive development, emotional and social development, language development, and sensory and motor development.
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