The Difference of Puberty between Girls and Boys.
Girls start puberty about 1 to 2 years earlier than boys, and they generally finish more quickly.
Girls reach adult height and are able to have children approximately 4 years after the first physical signs of puberty, but boys continue to grow for about 6 years after the first visible signs.
A girl's puberty can span from the age of 9 to 14 years, while a boy's lasts from the ages of 10 to 17 years.
The main male sex hormones are testosterone and androgen. Testosterone produces the changes related to virilization, or "becoming male," including a deeper voice, facial hair, and muscle development.
Female development depends mostly on estrogen and estradiol. Estradiol promotes the growth of the uterus and breasts.
Both males and females have estradiol, but levels rise earlier in girls than in boys, and women have higher levels than men. Similarly, testosterone plays a role in female development, but to a lesser extent than in males.
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during puberty: before:
Puberty is the time in life when your child's body becomes sexually mature. Your child will experience many changes in his or her body during this time. For girls, puberty usually starts around age 11. But it can start as early as age 6 or 7.