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Two of the most significant differences between puberty in females and puberty in males are the age at which it begins, and the major sex steroids involved, the androgens and the estrogens. Although there is a wide range of normal ages, females typically begin the process of puberty around age 10½; males at ages 11½—12.
Childhood is the age span ranging from birth to adolescence. [7] In developmental psychology, childhood is divided up into the developmental stages of toddlerhood (learning to walk), early childhood (play age), middle childhood (school age), and adolescence (puberty through post-puberty). Various childhood factors could affect a person's ...
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. Girls attain reproductive maturity about four years after the first physical changes of puberty appear. [3]
The average age of puberty’s onset — ranging from ages 8 to 13 for girls in the U.S. — has been dropping by about three months every decade over the last 40 years, according to a 2020 ...
Research has showed that the average age of starting puberty continues to drop over time: One study published in 2020 shows that the average starting age of puberty for girls has decreased by ...
Starting puberty significantly early — younger than age 8 in girls, 9 in boys — may have health effects lasting into adulthood, including higher risks of breast cancer, diabetes and heart disease.
In the nearly fifty years since those studies, the ages at which children are beginning puberty has only declined: (as of 2018) "The age of puberty, especially female puberty, has been decreasing in western cultures for decades now [...] for example, at the turn of the 20th century, the average age for an American girl to get her period was 16 ...
Early puberty also puts girls at a higher risk for teasing or bullying, mental health disorders and short stature as adults. [19] [39] [56] Girls as young as 8 are increasingly starting to menstruate, develop breasts and grow pubic and underarm hair; these "biological milestones" typically occurred only at 13 or older in the past. African ...