知識界強手請答=](20)

Puberty refers to the process of physical changes by which a child's body becomes an adult body capable of reproduction. Puberty is initiated by hormone signals from the brain to the gonads (the ovaries and testes). In response, the gonads produce a variety of hormones that stimulate the growth, function, or transformation of brain, bones, muscle, skin, breasts, and reproductive organs. Growth accelerates in the first half of puberty and stops at the completion of puberty. Before puberty, body differences between boys and girls are almost entirely restricted to the genitalia. During puberty, major differences of size, shape, composition, and function develop in many body structures and systems. The most obvious of these are referred to as secondary sex characteristics.

In a strict sense, the term puberty (and this article) refers to the bodily changes of sexual maturation rather than the psychosocial and cultural aspects of adolescent development. Adolescence is the period of psychological and social transition between childhood and adulthood. Adolescence largely overlaps the period of puberty, but its boundaries are less precisely defined and it refers as much to the psychosocial and cultural characteristics of development during the teen years as to the physical changes of puberty.

Physical changes in boys

Testicular size, function, and fertility

Genitalia

Pubic hair

Body and facial hair

Voice change

Height growth

Male musculature and body shape

你絕對冇問題
下體的毛係受到
身體荷爾蒙的多寡而影響
就好像青春期一樣
每個人的早或晚也不相同
所以並沒有正常的時間
因為有人荷爾蒙特別多
有人較少,舉例來說
有人很早生滿鬍子
但有人很晚才有
所以不用擔心

大佬 我今年15歲都仲未出
我仲擔心過你喇

唔一定咖'
有D 16碎既男女仔先生毛既'
應該遲D就有咖啦'