Boys grow fastest during puberty. Some boys may begin puberty as early as nine while others might not hit it until they’re 15. For many guys, their biggest growth spurt will be between the ages of 12 to 15. Puberty can last two to five years.The reason most guys stop growing at this age is because their growth plates fuse shortly after puberty. Bone age acceleration typically occurs during puberty
Answered 3/2/2021
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