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  2. Child development stages - Wikipedia

    en.wikipedia.org/wiki/Child_development_stages

    Three months old. Physical development. Typically grows 1 to 1.5 inches (2.5 to 3.8 cm) and gains 1.5 to 2 pounds (680 to 910 g). Social development. Develops a social smile. Communicates and expresses more using face and body. Four months old. Physical development. By this age, infants may have doubled their birth weights.

  3. Gesell Developmental Schedules - Wikipedia

    en.wikipedia.org/wiki/Gesell_Developmental_Schedules

    The Original Scale. The Gesell Developmental Schedules claimed that an appraisal of the developmental status of infants and young children could be made. The Gesell Developmental Schedule believes that human development unfolds in stages, or in sequences over a given time period. These stages were considered milestones, or the manifestations of ...

  4. Denver Developmental Screening Tests - Wikipedia

    en.wikipedia.org/wiki/Denver_Developmental...

    The Denver Developmental Screening Test ( DDST) was introduced in 1967 to identify young children, up to age six, with developmental problems. A revised version, Denver II, was released in 1992 to provide needed improvements. These screening tests provide information about a range of ages during which normally developing children acquire ...

  5. Groundhog - Wikipedia

    en.wikipedia.org/wiki/Groundhog

    Male groundhogs average slightly larger than females and, like all marmots, they are considerably heavier during autumn (when engaged in autumn hyperphagia) than when emerging from hibernation in spring. Adult males average year-around weight 3.83 kg (8 lb 7 oz), with spring to fall average weights of 3.1 to 5.07 kg (6 lb 13 oz to 11 lb 3 oz ...

  6. Bayley Scales of Infant Development - Wikipedia

    en.wikipedia.org/wiki/Bayley_Scales_of_Infant...

    The Bayley Scales of Infant and Toddler Development (version 4 was released September 2019) is a standard series of measurements originally developed by psychologist Nancy Bayley used primarily to assess the development of infants and toddlers, ages 1–42 months. [1] This measure consists of a series of developmental play tasks and takes ...

  7. Early childhood development - Wikipedia

    en.wikipedia.org/wiki/Early_Childhood_Development

    Early childhood development. Early childhood development is the period of rapid physical, psychological and social growth and change that begins before birth and extends into early childhood. [1] While early childhood is not well defined, one source asserts that the early years begin in utero and last until 3 years of age. [1]

  8. Gesell's Maturational Theory - Wikipedia

    en.wikipedia.org/wiki/Gesell's_Maturational_Theory

    The Maturational Theory of child development was introduced in 1925 [1] by Dr. Arnold Gesell, an American educator, pediatrician and clinical psychologist whose studies focused on "the course, the pattern and the rate of maturational growth in normal and exceptional children" (Gesell 1928). [2] Gesell carried out many observational studies ...

  9. File:CDC growth chart boys birth to 36 mths cj41c017.pdf

    en.wikipedia.org/wiki/File:CDC_growth_chart_boys...

    Short title: Birth to 36 months: Boys, Length-for-age and Weight-for-age percentiles: Image title: CDC Growth Charts: United States: Author: NCHS: Keywords

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