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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.
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 mental development. [1]
Physical development. Typically grows between 1 and 1.5 inches (2.5 and 3.8 cm) and gains about 2 pounds (910 g). [20] Motor development. Hands kept in tight fists. [21] Equal movement of arms and legs on both sides. [21] Able to briefly hold up head when in prone position. [21] Arm thrusts are jerky. [22] Brings hands close to eyes and mouth. [22]
Newmeyer suggests parents download the CDC's free milestone tracker app, which can help parents keep tabs on their child's development from ages 2 months through 5 years old.
Milestones are changes in specific physical and mental abilities (such as walking and understanding language) that mark the end of one developmental period and the beginning of another; [80] for stage theories, milestones indicate a stage transition. These milestones, and the chronological age at which they typically occur, have been ...
Developmental delay is prevalent in approximately 1-3% of children under the age of 5 worldwide. [5] According to a systematic analysis done for a conducted study in 2016, there are approximately 52.9 million children worldwide under the age of 5 that are affected by some type of developmental delay or delayed milestone.
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]
Developmental regression is when a child who has reached a certain developmental stage begins to lose previously acquired milestones. [1] It differs from global developmental delay in that a child experiencing developmental delay is either not reaching developmental milestones or not progressing to new developmental milestones, while a child experiencing developmental regression will lose ...