The size of breasts is related to race, heredity, obesity and other factors. Generally speaking, the breasts of Chinese women are smaller than those of western women, while those who are slender and thin have smaller breasts, while those who are plump and obese have larger breasts. He weighs no more than a hundred, either flat-chested or short. This joke also reflects the effect of figure on breasts to some extent.
Estrogen plays a vital role in breast development. Estrogen is mostly secreted by the ovaries. Normal women after puberty, ovaries secrete estrogen can promote and maintain the development of women's secondary sexual characteristics, if the female to 16 years old, breast tissue can not fully develop and stay in the childhood breast state, there is no menstruation, the main reason may be poor gonadal development, such as congenital ovarian dysplasia
love egg , congenital anovary and so on.
Conditions that affect breast development
1. Excessive dieting, weight loss, insufficient protein intake
Being hungry for a long time is bound to consume the fat and protein stored in the body, and one of the main structural components of the breast is fat and collagen. Chest fat reduction, skin relaxation, chest muscle loss, and undernutrition causes glandular tissue atrophy, overall chest tissue reduction, but the connective tissue connecting chest muscle and breast is not reduced, so the chest becomes smaller and sagging.
2. Adolescent endocrine disorder
Lack of adolescent sexual knowledge and girls' sense of humiliation can lead to psychological disorders that cause endocrine disorders and affect the normal development of the breast.
3. Wrong size of bra or underwear
There are adolescent girls because of psychological disorders and the chest tied up, or the wrong size of underwear, easy to cause breast dysplasia.
A bra that is too small will affect the development of the chest, and wearing a bra that is too large for a long time may cause the chest to sag.
4. Sleep on your stomach
It doesn't matter if you sleep on your stomach once in a while, but if you sleep face down for a long time, women's breast tissue will be squeezed too much, resulting in premature breast aging, loose skin, breast deformation and expansion, and poor breast blood circulation.
5. Lack of physical exercise
Due to the long-term lack of moderate physical exercise, chest muscles are underdeveloped.
6. Genetic factors
Does massage have an effect on breast size?
The essential oil used for massage contains certain hormone ingredients, and massage can promote blood circulation and lymphatic circulation to a certain extent, making the chest skin more elastic, so it looks like it will have a certain effect than before massage.
However, there is no scientific basis for the claim that massage can stimulate the increase of estrogen secretion by the ovary, which is mainly regulated by the hypothalamus-pituitary-ovary axis. It is an exaggeration to increase the size of the breast to a great extent through massage.
How to wear a bra for adolescent girls
"the reason why bras become the 'pet' of women, on the one hand, is to prevent breast sagging; on the other hand, it is needed for physical fitness." "but it's a pity that more and more women are getting breast injuries because of bra discomfort," the expert said. It can be said that the bra has become one of the important causes of breast disease. " It is recommended to wear it after the age of 18.
Nine out of ten modern women wear bras have misunderstandings: inappropriate size will cause long-term pressure on the breasts and poor blood circulation; when wearing a bra, the habit of holding the breasts under the breast will destroy its natural state and affect its metabolic function; choosing a bra with a steel support just blocks the part of lymphatic reflux; the light picture is beautiful and does not look at the material, so that the breasts are in a confined space for years and can not breathe fresh air. "Don't be careless. With the passage of time, these will become the fuse of breast diseases such as breast hyperplasia, mastitis and even breast cancer, bringing unimaginable harm to women." Therefore
bullet vibrator , Xu Hong suggests that wearing a bra should follow the following principles.
First of all, the time to wear a bra should not be too long, not more than 8 hours a day
huge dildo , let alone sleep with a bra. When you have nothing to do, you can do more chest expansion exercises or lift the upper limbs to promote blood circulation.
Secondly, choose cotton. Chemical fiber bra is easy to induce skin allergy and poor air permeability. When people are active, the bra will constantly rub the nipple, and the fiber filaments in the bra can easily enter the breast from the breast hole. For a long time, it will block the breast and nipple and cause breast disease.
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