Young person in the transition from childhood to adolescence age. Modern science defines adolescence, depending on the country (region of residence), and the cultural and national characteristics, as well as the floor (from 12-14 to 15-17 years). In 2011 there are more than one billion adolescents [1].
In the 12-17 years adolescent enhanced secondary sexual characteristics. The girls appear menstruation: it is a sign that the ovaries have begun to develop and mature egg. For 12-15 years, boys begin to grow facial hair, body, armpits, having wet dreams - the first sign of puberty boys.
Usually this age is called transitional. At this time, teenagers in frequent friction with her parents, one of the teens looking for himself, his purpose in life, and enjoys philosophy, seeks to learn more about the opposite sex. And there are relations between adolescents and adolescent communication.
The authors of the UN report "Situation of Children in the World" (2011) report [1], that adolescence - an important stage of human development. After all, in the second decade of life clearly manifested poverty and inequality. Young people from poor backgrounds are less likely to receive an education. They are more often exposed to violence and abuse. They are attracted to the hard work and they are forced into early marriages. In the developing world, the risk of the girls to get married at the age of 18 are three times higher than in rich countries. Early marriages are accompanied by high maternal and infant mortality and poverty, and poverty. Most of today's teens - 88% - live in developing countries. Many of them are facing enormous difficulties.