Puberty is a period of several years in which rapid physical growth and psychological changes occur, culminating in sexual maturity.The average age of onset of puberty is at 11 for girls and 12 for boys.Consequently, girls that reach sexual maturation early are more likely than their peers to develop eating disorders (such as anorexia nervosa).
Because they appear older than their peers, pubescent boys may face increased social pressure to conform to adult norms; society may view them as more emotionally advanced, despite the fact that their cognitive and social development may lag behind their appearance.
Some boys may develop gynecomastia due to an imbalance of sex hormones, tissue responsiveness or obesity.
As with most human biological processes, this specific order may vary among some individuals.
In addition to changes in height, adolescents also experience a significant increase in weight (Marshall, 1978).
The weight gained during adolescence constitutes nearly half of one's adult body weight.