At what age is breast development normal for girls?

Women develop twice in their lifetime, and their breasts develop three times. So at what age is it normal for girls' breasts to develop? The early stage is childhood, and the symptoms are not obvious until puberty when the breasts formally develop. This development can last for several years. The youngest ones develop at around ten years old, and the development takes 3 to 6 years. After these years of development, the breasts mature. However, women will also have a certain development if they are affected during pregnancy. Let us learn the correct knowledge below.

Breast development is the earliest feature of female secondary sexual characteristics. Generally, girls begin to develop around the age of ten and mature after about 3.5 years.

1. Infancy: At birth, the nipple is inverted, the areola is formed, and contains a ductal-alveolar system with 15 to 20 lobes. The alveoli contain a small amount of colostrum (because the fetus's breasts secrete fluid due to stimulation of the mother's estrogen). However, it will be discharged from the nipple within one week after birth and can last until three to four weeks after delivery. The alveolar tissue will also quickly degenerate into ductal tissue. During infancy and childhood, the breasts do not develop much.

2. Puberty: When girls are ten to twelve years old, the hypothalamus begins to secrete gonadotropin-releasing hormone, which causes the pituitary gland to secrete gonadotropin, further stimulating the ovaries to secrete estrogen and progesterone. Estrogen stimulates the development of the mammary ducts, while progesterone stimulates the development of the alveoli, resulting in the rapid growth of breast tissue during puberty. Generally, breast development during adolescence is divided into five stages: a. Stage 1: Nipple protrusion. b. The second stage: From the age of ten to twelve, the breasts begin to develop, the areola also becomes larger, and the breasts form a small hill. c. The third stage: around thirteen to fourteen years old, the nipples and breasts continue to develop. d. The fourth stage: From the age of fourteen to fifteen, the areola and nipple begin to swell, and the breasts gradually become spherical. e. Fifth stage: After the age of fifteen, the breasts gradually mature and take shape.

3. Pregnancy: The most obvious change a few weeks after conception is breast enlargement, which lasts throughout the pregnancy. In early pregnancy, the blood vessels in the breasts increase and the surface veins become more obvious, which is usually accompanied by pain and itching. In addition, the areola and nipple will become larger and darker in color. The changes in breast tissue are proliferation of ductal cells and alveolar cells, resulting in the growth and branching of ducts, which can be several times that of non-pregnant women.

From the middle of pregnancy, the proliferation of alveolar cells gradually decreases, and is replaced by cell differentiation. Alveolar cells gradually become single-layer secretory cells from the middle of pregnancy. Therefore, in the middle of pregnancy, a small amount of light yellow liquid can be seen in the alveolar cavity, which is called colostrum. Breast enlargement continues throughout pregnancy because cells continue to differentiate and develop, and the secretion of alveolar cells continues to increase.

After reading the article, we can accurately answer the question of at what age is it normal for girls to have normal breast development. Well-developed female breasts can increase women's self-confidence and make their body proportions more perfect. Girls can eat more breast-enhancing foods after secondary development. They can also enhance breast development through methods such as breast-enhancing massage. At the same time, we should also observe abnormalities in breast development. If the patient has poor breast development, we should be prepared to treat the disease.