Physiological characteristics of pubertal development

　　The first growth peak is from birth to about 1 year old.

　　The second growth spurt is the sudden increase in height during adolescence. The period when height increases fastest is pre-puberty, and the peak height is around 14 years old. female At the age of 19-23, male Height growth stops around the age of 23-26.

　　Weight - The weight of adolescent boys and girls increases rapidly, with an average weight gain of 5-6 kg per year. Each person's body shape, height and individual differences are limited and affected by many factors. It doesn't matter whether you are tall, short, fat or thin, what matters is how you make yourself healthy grow. Uniqueness is beauty!

　　Masculine beauty and feminine beauty-the emergence of secondary sexual characteristics makes puberty boy Children become more and more handsome and become men; adolescent girls become slimmer and more beautiful, thanks to the gonads.

　　Sex hormones secreted by the gonads trigger the appearance of secondary sexual characteristics. So, what are secondary sexual characteristics? Secondary sexual characteristics refer to the external manifestations of sexual development. In addition to the different reproductive organs of men and women, boys and girls have different expressions in terms of body shape, posture, appearance, voice, etc., and there are obvious differences.

　　Let us learn about the characteristics of female secondary sexual characteristics and the characteristics of sexual maturity. The secretion of estrogen in women during puberty promotes the development of secondary sexual characteristics. Its characteristics are:

　　About 3-4 years before menarche, a girl's breasts begin to develop. At this time, a swollen and painful hardness appears around the nipple. If you touch it accidentally, you will feel pain, which often causes girls' uneasiness and fear. In fact, this change is the only way for breast development. When the breasts mature, they will no longer be painful. Around the age of 15, when the breasts are basically in shape, it is time to wear a bra. You should choose a bra made of fine soft cotton and a suitable size, wear it consistently, and wash and change it frequently.

　　Another characteristic of female secondary sexual characteristics is that the buttocks protrude and the pelvis becomes wider. in addition skin It becomes delicate, smooth and soft, and the plump body shows the feminine beauty and gracefulness of women.