What age do boys reach puberty?

Boys enter puberty from the age of 13-14 to 18-20. During this period, not only does the human body grow rapidly, but male characteristics also gradually develop and mature. For example, secondary sexual characteristics such as a deep voice, a prominent Adam's apple, a beard, and male pubic hair appear in the male body shape, and there are physiological conditions such as frequent ejaculation and ejaculation.

Men: Long beard, prominent Adam's apple, deep and strong voice, more body hair, and hair growing under the armpits and around the genitals (male pubic hair).

1. Three stages of puberty

Early stage: Growth and development increase significantly, and secondary sexual characteristics begin to appear.

Mid-late stage: characterized by rapid growth and development of secondary sexual characteristics, most of them have experienced their first frequent spermatorrhea.

Late stage: Sex hormone growth and development are basically complete, secondary sex growth and development are in progress, epiphyseal lines tend to be completely healed, and physical fitness gradually ceases.

2. Due to the influence of climate, physical fitness, genetic inheritance, nutritional composition and other factors, the age of puberty varies slightly.

The growth and development of body capacity under weight is accelerated, and a significant increase in the second growth and development occurs;

At full term, the volume of each person's internal organs expands and their functions gradually improve;

The activity of the endocrine system of the umbilical cord is high, and the metabolism of growth hormone related to development continues to increase;

The growth and development of the cartilaginous urinary system suddenly accelerates, and by the time puberty is complete, it has a reproductive function;

Reorganizing the growth and development of secondary sexual characteristics makes the physical differences between men and women more obvious;

While the physical fitness and functions of the person are growing rapidly, silver plaque also causes drastic changes in the psychological state, making it easy to develop mental health problems.

3. The growth and development of male reproductive organs (reproductive organs refer to male testicles, male genitals, scrotum, and glans penis)

In the third grade of elementary school (before about 9 years old), the male testicles of boys are small in volume and less than 2.5cm in length. The male genitals and scrotum are still in the child type. In the fourth and fifth grades (about 9-11 years old), the length of male testicles begins to increase, the penis thickens, and the skin of the scrotum loosens and becomes bright red. On the penis and toe bones, there are short, sturdy, light-colored and relatively soft male pubic hair. After the sixth grade, the male testicles begin to thicken, increase in weight and lengthen, the male genitals and scrotum expand, and the male pubic hair grows, turns black, and is slightly harder and denser.

Testicular enlargement is a sign that male puberty growth and development has just begun. It occurs between 9.5 and 13.5 years old, with an average of 11.5 years old. Six months to a year later, the penis begins to expand, with an average age of 12.5 years old. Before puberty, the penis length is generally less than 5cm, and by the end of puberty, it can reach 12.4cm.