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For a guy, there isn't just one event or sign that you're growing up. There are lots of them, including your body growing bigger, your voice changing, and hair sprouting everywhere. Most boys begin puberty between the ages of 9 and 14. But keep in mind that puberty starts when a boy's body is ready, and everyone grows at his own pace.
Testosterone is the hormone that causes most of the changes in a boy’s body during puberty, and men need sperm to be able to reproduce
Estrogen is involved in the onset of puberty, playing a role in development of so-called secondary sex characteristics, such as breasts, and pubic and armpit hair.
Testosterone is the hormone that causes most of the changes in a boy’s body during puberty, and men need sperm to be able to reproduce
Estrogen is involved in the onset of puberty, playing a role in development of so-called secondary sex characteristics, such as breasts, and pubic and armpit hair.
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