What are the characteristics of breast development in girls?

We also know that breasts are a symbol of femininity, and the development of breasts to a certain extent also indicates that a girl has reached physical maturity. However, many people do not know much about the characteristics of breast development, so they do not know whether their breast development is in a reasonable state. So what are the characteristics of breast development? I hope that female friends can pay attention to it. Let us learn about it together.

Normal breast development begins between the ages of 9 and 14. Foreign scholars who study puberty generally divide the entire process of breast development into five stages. Tanner's staging criteria for breast development are:

In the first stage, which is the prepubertal stage, breasts are not yet developed.

In the second stage, the early stage of breast development, the breast bud under the nipple begins to grow and appears as a distinct mound-shaped protrusion. In the third stage, the breasts become round and shaped like adult breasts, but smaller in size.

In the fourth stage, the breasts enlarge rapidly, and the nipples and areola protrude forward, shaped like small balls.

Stage 5, normal adult breast. The nipple, areola and round breast are integrated into one.

Most girls enter the second stage of breast development between the ages of 9 and 13. The entire process of breast development in girls from stage 2 to stage 5 takes an average of 4 years. Some girls develop quickly, taking only about one and a half years; while some girls develop slowly, taking nine years.

Research has shown that breast development is controlled and regulated by many factors, including systemic development, neural and endocrine changes, nutrition, disease, and genetics. Among them, endocrine factors have a greater impact on breast development. Specifically, breast development is mainly affected by hypothalamic-pituitary gonadotropin, prolactin, and estrogen and progesterone secreted by the ovaries. Small breasts may be due to low levels of the above hormones in the body, or simply due to poor nutrition and being too thin. Girls with underdeveloped breasts often also have defects in their pectoral muscles. Not only are their pectoralis major muscles weak, but a considerable part of the chest wall is also flat or even sunken. Healthy breasts require strong pectoral muscles, so doing aerobics regularly will definitely help correct small breasts. This includes chest expansion exercises, dumbbell exercises, arm circle shoulder exercises, or sitting on a chair facing a wall and pushing the wall with your hands, all of which can strengthen the supporting tissue of the breast.

The above introduces the characteristics of girls' breast development. Girls are relatively young during puberty and lack relevant knowledge. Therefore, mothers should guide their children in this regard. Never let children diet during breast development, let alone bind their breasts, as these will be detrimental to breast development.