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when does puberty happen

Question in full: when does puberty happen
This varies quite a lot between individuals, and between boys and girls. However, most boys begin puberty between the ages of 10 to 14, and finish between 15 and 17. Most girls start a little earlier – between 9 and 13. For boys, the first signs of puberty are usually enlargement of the testes and scrotum (balls), followed by development of pubic hair. In girls, breast growth is usually the first sign, followed by the appearance of pubic hair (but quite often pubic hair comes first). Breast development may continue until the age of 18. Periods start reasonably late in puberty, with most girls starting between the ages of 11 and 15. The main thing to say is that, no matter when we start puberty, we all end up at the same place. Have a look at our section on Stages of Puberty for more information.