During this period, both boys and girls have undergone many great and wonderful changes inside and outside their bodies. Therefore, it is undoubtedly a very important event for children to master and understand the physical changes during this period.
Adolescence refers to the stage from immaturity to maturity of individual sexual function, and biologically refers to the transition period from immaturity to maturity of human body, that is, the transition period from children to adults. During this period, my personality is mature and I can have children. It can be seen that adolescence is mainly a stage divided by physiological maturity. It overlaps with the stages of life divided from psychological or social aspects. In the stage of human growth and development, adolescence accounts for half or even more time. At present, there is no consistent age range of adolescence in different countries, which generally refers to 13, 14 ~ 17 and 18 stages. It is also called early youth in psychology, which is equivalent to middle school in pedagogy. It is characterized by rapid physical growth. Except adolescence, adolescence will last until the age of 25-30. Because men's sexual maturity is about one year later than women's, the age range of male puberty can be determined as 14- 18 years old. 1-2 years, it is normal to be too early or too late. People usually call men of this age young.