Secondary sexual characteristics determine the changes that occur in the structure and functions of various organs. They characterize the sex of a person. Do not confuse them with the primary sexual characteristics that identify the sexual organs.

Secondary sexual characteristics are directly dependent on the primary signs. They begin to manifest themselves during the ripening period, when the level of sex hormones increases. Such signs include: development of mammary glands, features of the hairline, body proportions, musculoskeletal system, subcutaneous fat, difference in behavior and much more.

Signs of puberty in girls appear about 10-11 years. Under the influence of hormones, body mass and growth are rapidly increasing. The extremities grow faster than the body itself. The shape of the pelvis and the entire skeleton as a whole changes. In the hips, buttocks and abdomen fat is deposited, due to which the body shape is rounded. The skin becomes tender and fine. There is growth and development of the mammary glands and protrusion of the okolososkovy circle. Later, the breast glands will increase. They accumulate fatty tissue, which contributes to the formation of a mature mammary gland. The hair on the head grows stronger. They appear in the armpits and pubic area. The latter occurs much earlier for girls than for boys. For women, hair distribution in the form of a triangle with a clear border above the pubis is characteristic.

At this time, the sweat glands begin to actively work and give off a characteristic female smell. Sebaceous glands begin to work , as a result of which most adolescents have some skin problems in the form of juvenile acne and acne.

After two or three years from the time of the manifestation of the symptoms described above, the girls begin menstruation. It is considered the main sign of puberty. Menstruation indicates that the girl is able to become pregnant. At this age it is necessary to talk as often as possible with the child and explain all the changes that occur with the body. It is very important to correctly tell about the sexual life and all the dangers associated with it.

Sexual signs, actively developing at this age, do not indicate the maturity of the body. The onset of pregnancy severely harms health and affects the ability to have children in the future.

The general maturity of the female body comes after a few years. Usually it's 17-18 years old. By this time, secondary sexual characteristics are already well developed, and the reproductive system functions at full strength. Only now we can say that the girl's body is ready for motherhood.

The boys develop a little later. Secondary sexual characteristics are characterized by intensive growth of the body, penis and testicles, as well as an increase in body weight. Due to the fact that the shape of the larynx changes, the voice coarsens and becomes lower. In the armpits, on the pubis and face appear hair. Some young men have swelling of the mammary glands and a high sensitivity of the nipples. By the age of 15 they have a sexual arousal and can be polluted.

In young men, the seminiferous tubule is filled with spermatogonia. Starting from the moment when the sex glands will be able to produce mature spermatozoa, you can talk about joining the young man at the time of puberty. Development of secondary sexual characteristics in men occurs up to 23-25 years. As a rule, to this age the appearance of a man is already fully formed. He is able to lead a normal sex life and bring up offspring.

Sex education is an important role in the life of young men and women. Parents should explain the rules of behavior in an easy and accessible manner. Do not let children know about the relationship of men and women from TV screens or from friends. Such knowledge can bring considerable harm to very young people.