puberty in girls.
The puberty of is called two years of very rapid growth or development, which precede the attainment of "maturity".It is believed that the girl reaches puberty after the first menstruation. The boys do not have such a clear sign. Therefore, consider first the sexual maturation of girls.
First of all, it should be understood that there is no strictly defined age of reaching puberty. Most girls start this process at eleven and finish two years later, at thirteen. But quite a few start at nine. Later development can begin at thirteen years. In the most extreme cases, early development begins at seven years, and later at fifteen.
The fact that a girl begins to mature sooner or later than usual does not at all mean that her glands are not working properly. It only means that it develops, if one may say so, on an accelerated or slow schedule. This individual schedule seems to be innate. If the parents developed late, then they and the children will develop late, and vice versa.,
Let's see what happens to the average girl when at the age of eleven she begins the process of puberty. In seven or eight years, it grew 5-6 cm per year. At nine years, its growth slowed to 4 cm per year. Nature seemed to have pressed the brakes. And suddenly at the age of eleven the brakes are refused. In the next two years the girl rushes upwards at a speed of 8-10 cm per year. Previously, it annually added 2-3.5 kg of weight per year, and now it arrives at 4.5-9 kg and does not become fuller. She has a wolfish appetite to keep up with this weight gain.
But there are other changes. At the beginning of the period begins development of the breast. At first, the areola is slightly enlarged and slightly swollen( a dark ring around the nipple).Then the whole chest begins to take shape. In the first year and a half she has a conical shape, but when the first menstrual period approaches, the breasts are rounded and begin to resemble hemispheres. Shortly after the onset of development of the breast, pubic hair grows. Still later, hair appears under the armpits. Hips widen. Skin changes the texture.
At thirteen years the average girl has the first menstruation. Now she has a woman's body. She has reached the weight and height, which she will most likely retain and later. Henceforth, growth is rapidly slowing down. Over the next year after the first menstrual period, she will grow 4 cm, another year - possibly, 2. Many girls in the first year or two menstruation occur irregularly and rarely. This is not a sign of illness;it seems, this is just a manifestation of the inexperience of the body.