jc+and+niBoys+puberty

__ Boys __ **Testicular size, function, and fertility** In boys the testacies are the first physical change of puberty. Throughout puberty the testacies continue to grow finishing about 6 years after they started. After this the penis starts to increase. **Pubic, body and facial hair ** Pubic hair often appears very shortly after the genitalia. Pubic hair grows around the base of the penis. The first hair is under arm hair then perianal hair, upper lip hair, sideburn (preauricular) hair, periareolar h air, and the beard area.

__ Voice change __ Under the influence of androgens, the voice box grows in both sexes. This sound is a lot more obvious in boy with their voice becoming much deeper sometimes there are thing that happen called testy pops which is when your voice box cannot reach that note or sound. Before puberty, the voice box of boys and girls is about equally small. Most of the voice change happens during stage 3-4 of male puberty around the time of peak growth. Full adult pitch is attained at an average age of 15 years. It usually precedes the development of significant facial hair by several months to years.

__ Male musculature and body shape __ About half way through puberty boys bones start to become heavier and start to grow more bone muscles and by the end of puberty, adult men have heavier bones and nearly twice as much skeletal muscle. Some of the bone growth (e.g. shoulder width and jaw) is disproportionately greater, resulting in noticeably different male and female skeletal shapes. Men have about 50% less body fat than women because of all the physical activity and genes and also because of that same reason they have about 150% more muscle than women.

This muscle develops mainly during the later stages of puberty, and muscle growth can continue even after boys are biologically adult. The peak of the so-called "strength spurt", the rate of muscle growth, is attained about one year after a male experiences his peak growth rate.

__ Body odor and acne __ Rising levels of androgens can change the fatty acid composition of perspiration, resulting in a more "adult" body odor. As in girls, another androgen effect is increased secretion of oil from the skin and the resultant variable amounts of acne. Acne cannot be prevented or diminished easily, but it typically fully diminishes at the end of puberty. However, it is not unusual for a fully grown adult to suffer the occasional bout of acne, though it is normally less severe than in adolescents. Some may desire using prescription topical creams or ointments to keep acne from getting worse or even oral medication, due to the fact that acne is emotionally difficult and can cause scarring.