When is the second development period for boys?

Human body development refers to the continuous development of the body from a child to an adult until it is completed. Boys generally begin to develop from the age of 13-14, starting with the bones and other aspects of the body and the reproductive organs. Boys generally stop developing after the age of 20-21. Generally, the genitals will develop a second time after puberty. You can eat more nutritious foods at ordinary times.

When does a boy reach puberty?

Boys generally begin to develop at the age of 13 and stop developing at around the age of 20. Bones, reproductive organs, muscles, hair, etc. begin to change. The second development of the penis is during puberty and will not develop again after that.

Key Features

General characteristics

Physiological growth, with sexual maturity as its main content, has a significant impact on the psychological and social aspects of adolescents, forming several important characteristics of this period:

Adolescence is a period of transition

Puberty is the period when an individual transitions from childhood to adulthood. People usually make a clear distinction between adolescence and childhood, and the dividing line is sexual maturity. For men, the sign of sexual maturity is spermatorrhea (usually during sleep at night); for women, it is menstruation, that is, the first menstruation. The physiological development centered on sexual maturity makes adolescents have social and psychological characteristics that are significantly different from children. Individuals are dependent on adults during childhood, and adults constrain and determine the main content and aspects of children's lives and activities; children are not responsible for their own behavior. With the increase of age, the scope of life and the content of activities gradually become more complex, which makes adolescents have different characteristics from children. They gradually have certain specific intentions and sense of responsibility and decide for themselves how to conduct certain activities.

Juveniles are subject to certain criminal responsibility for their own behavior, especially some criminal behavior. However, juveniles are also different from adults. Although they have a certain degree of independence, they are not completely independent; in many aspects, especially in terms of material life, they still have to rely on their parents; they have not yet become fully responsible people, and they are not criminally responsible for all their behaviors. It can be seen that this transitional status between children and adults makes juveniles what is called marginalized people in sociology. The uncertainty of their status and the uncertainty of the demands made by society on them have caused them to have many special mental health problems.

Adolescence is a period of development

Puberty is the period when a person's body development is complete. Studies have shown that there are two stages in a person's life when the body grows rapidly and the proportions of various parts of the body change significantly. One is the prenatal period and the first six months after birth, and the other is puberty. The rapid growth and development during puberty is called the adolescent growth spurt. In fact, this phenomenon begins before or at the same time as sexual maturity and ends six months to a year after sexual maturity. The rapid growth of men starts from 10.5 to 14.5 years old, reaches its peak at around 14.5 to 15.5 years old, and then gradually slows down. At around 18 years old, the height reaches the fully developed level, and the weight, muscle strength, shoulder width, pelvic width, etc. are also increased. At the same time, sexual function and secondary sexual characteristics also mature. For example, when women undergo external changes such as menstruation and secondary sexual characteristics, their reproductive organs also gradually mature. Pubic hair begins to appear on the vulva, vaginal secretions begin to increase, the uterus grows and enlarges, and the follicles in the ovarian cortex begin to undergo different stages of development. All of these indicate that they have begun to transition to sexual maturity. The physical and sexual development has a significant impact on the psychological characteristics and social life of teenagers, which also gives rise to a series of psychological health problems.