Puberty is when humans become sexually mature, usually starting around age 12 for boys. Hormones like testosterone play a key role in driving the physical changes of puberty, including growth spurts and reproductive organ development.
Puberty is the period during which humans become sexually mature. It typically begins around age 12 for boys in the United States. The physical changes of puberty, including growth spurts and development of reproductive organs, are mainly triggered by hormones like testosterone.
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