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A 2006 study in Denmark found that puberty, as evidenced by breast development, started at an average age of 9 years and 10 months, a year earlier than when a similar study was done in 1991. Scientists believe the phenomenon could be linked to obesity or exposure to chemicals in the food chain, and is putting females at greater long-term risk ...
Puberty is a period of several years in which rapid physical growth and psychological changes occur, culminating in sexual maturity. The average age of onset of puberty is 10–11 for girls and 11–12 for boys.
Among researchers who study puberty, the Tanner scale is commonly considered the "gold standard" for assessing pubertal status when it is conducted by a trained medical examiner. [5] In HIV treatment, the Tanner scale is used to determine which regimen to follow for pediatric or adolescent patients on antiretroviral therapy (adult, adolescent ...
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 ...
Additionally, women and girls who experience irregular or painful periods, abnormal vaginal discharge, itching or other concerning symptoms related to their pelvic organs should see a gynecologist ...
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.
Girls mature a year earlier, and become a bat mitzvah ("bat mitzvah" means "daughter of the commandment") at twelve. The new men and women are looked upon as adults and are expected to uphold the Jewish commandments and laws. Also, in religious court they are adults and can marry with their new title of an adult.
The Care and Keeping of You: The Body Book for Girls by Valorie Lee Schaefer is an educational children's book about puberty, female health and hygiene. It was written for readers aged eight years and older, and does not mention sex or sexuality.