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Although there is a wide range of normal ages, females typically begin the process of puberty around age 10½ and end puberty around 15–17; males begin around ages 11½—12 and end around 16–17. [1] [2] [3] Females attain reproductive maturity about four years after the first physical changes of puberty appear. [13]
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 ...
The average age of onset of puberty is 10–11 for girls and 11–12 for boys. [10] [11] Every person's individual timetable for puberty is influenced primarily by heredity, although environmental factors, such as diet and exercise, also exert some influences. [12] [13] These factors can also contribute to precocious and delayed puberty. [14] [13]
Managing the physical changes of puberty alongside cognitive, emotional, and social changes means teenagers and preteens are juggling a lot. ... visit shot up 50.6% among girls aged 12-17 compared ...
Another study, which was published in 2024, found that the average age that girls had their first periods decreased from 12.5 years old in 1950 to 1969 to 11.9 years old in 2000 to 2005.
In girls, puberty and periods normally start between the ages of 10 to 15, but experts say this has been getting earlier in recent decades. In girls, puberty and periods normally start between the ...
In the United States, the age of onset of puberty in girls depends heavily on their racial background. Delayed puberty means the lack of breast development by age 12.8 years for White girls, and by age 12.4 years for Black girls. [7] [8] The lack of menstruation by age 15 in any ethnic background is considered delayed. [8]
The age of puberty for girls has been falling for decades, especially among Black and Asian Americans. ... 12.5 when they had their first period. Less than 9% had menarche — the scientific term ...
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