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girls start about the age of 10 and boys start an 11 12 13 just depends

Menstruation and puberty are inextricably links in females. The onset of the menses is also the onset of puberty.

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Q: Why does mentruation start during the age of puberty and not before it?
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Can growth spurts start before puberty?

You have a growth spurt before puberty when you are age 7-9. And you will have your next growth spurt during puberty, usually age 13-15.


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