"It is the name of the period that is characterized by a lot of changes that occur between 8-16 years of age. The hormones (chemical regulators that are produced in our body) are responsible for these physical and emotional changes. By going through puberty the human being reaches full sexual maturity".
Mavis Jukes.

"It is the stage where children turn into adults. The girl's breasts grow, the boy's voice lowers. Hair grows in the armpits and pubic area that most of the girls find disturbing. But nor are the boys happy about the first down that starts appearing on their face that is still far from a real beard".
Joseph Von Westphalen.

"The stage between 10 and 14 years can be very amusing though from a physical viewpoint these years can be the most confusing and disconcerting in your whole life. And that is simply because you are leaving your childhood behind and are turning into an adult".
Peter Mayle.

"Between 15 and 17 years of age you leave your childhood behind and enter a stage of instability, transformation and confusion".
Jonathan Bradley y Hélène Dubinsky.