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Derived from the Latin puberatum (age of maturity), the word puberty describes the physical changes to sexual maturation, not the psychosocial and cultural maturation denoted by the term adolescent development in Western culture, wherein adolescence is the period of mental transition from childhood to adulthood, which overlaps much of the body ...
Girls have usually reached full physical development around ages 15–17, [3] [11] [34] while boys usually complete puberty around ages 16–17. [ 11 ] [ 34 ] [ 35 ] Any increase in height beyond the post-pubertal age is uncommon.
The Tanner scale (also known as the Tanner stages or sexual maturity rating (SMR)) is a scale of physical development as pre-pubescent children transition into adolescence, and then adulthood. The scale defines physical measurements of development based on external primary and secondary sex characteristics , such as the size of the breasts ...
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Until the maturation of their reproductive capabilities, the pre-pubertal physical differences between boys and girls are the external sex organs. On average, girls begin puberty around ages 10–11 and end puberty around 15–17; boys begin around ages 11–12 and end around 16–17.
There are few population differences in cognitive development: boys and girls show some differences in their skills and preferences, but there is a great deal of overlap between them. [52] Some differences are seen in fluid reasoning and visual processing, as until about the age of four girls outperform boys in tests of these skills, but by ...
Physical development. Infants are usually born weighing between 5 pounds 8 ounces (2,500 g) and 8 pounds 13 ounces (4,000 g), but infants born prematurely often weigh less. [17] Newborns typically lose 7–10% of their birth weight in the first few days, but they usually regain it within two weeks. [17]
A similar book aimed at boys between the ages of nine and twelve, Guy Stuff: The Body Book for Boys, was written by Natterson. It discusses the physical, social and emotional changes that boys may experience during puberty, as well as general hygiene and health issues commonly encountered during adolescence. [15] [16]