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There is early development of secondary sex characters and gametogenesis also starts earlier. Precocious puberty is of two types: true precocious puberty and pseudoprecocious puberty. In a minority of children with precocious puberty, the early development is triggered by a disease such as a tumor or injury of the brain. [1]
[5] Recent research has challenged Gesell's age norms, showing that newborns may have more abilities than was reported and that his developmental picture may be too slow. [ 11 ] Newborns have been found to be a lot “smarter” than Gesell originally reported showing advanced competencies at early ages.
The following year, Paul Mussen and Mary Cover Jones (1958) replicated the study using late and early maturing adolescent girls. [14] The researchers had different hypotheses for the girls than the boys. The advantageous socio-psychological environments that boys were exposed to for maturing earlier were different for early maturing girls.
Early-maturing males develop "more aggressive, law-breaking, and alcohol abusing" behaviors, which result in anger towards parents and trouble in school and with the police. Early puberty also correlates with increased sexual activity and a higher instance of teenage pregnancy, both of which can lead to depression and other psychosocial issues.
Breast development will also be completed by this stage. In boys, four stages in development can be correlated with the curve of general body growth at adolescence. The initial sign of sexual maturation in boys usually is the "fat spurt". The maturing boy gains weight and becomes almost chubby, with a somewhat feminine fat distribution.
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