Puberty: from 9 years old to 10 years old, the breast nucleus appears due to the stimulation of ovarian hormone secretion, and gradually increases, and 15 years old basically takes shape. However, at first, breasts are more elastic because they contain fewer fat cells. Some people may have different breasts, and this difference will naturally disappear with the development of the body.
Law of care: seize opportunities and help development. Although the size of the breast has a great relationship with heredity, laying a good foundation at this time will also have extraordinary play. We can work hard from two aspects. First of all, do more chest exercises, such as push-ups, swimming, all kinds of ball games, and hold your chest and abdomen at any time. The second is to pay attention to balanced nutrition, not partial eclipse, especially to supplement enough fat and water. Wear a bra at the right time. Wearing a bra too late affects the figure and hinders development too early. The wearing time can be judged according to this: the nipple becomes obvious, the breast shakes when running, and the breast contour is obvious. If the size difference between the upper and lower bust is greater than 16 cm, you can also wear a bra. Besides, the bra should not be too tight. Wear a bra for no more than 12 hours every day, and re-measure the chest circumference every three or four months for replacement.
Menstruation: 7 ~ 10 days before menstruation, the breast begins to increase under the action of estrogen in the body, until the hormone level drops during menstruation, and the breast gradually recovers, and returns to normal after menstruation 7 ~ 8 days.
Nursing rule: stay away from spicy stimulation within one week before menstruation, and try to eat light and high-fiber food to avoid excessive menstrual hormone activity and aggravate breast pain.
Pregnancy: The degree of mammary gland development during pregnancy is one of the important factors that determine milk secretion. Normal breasts weigh about 200 grams. After pregnancy, subcutaneous varicose veins, enlarged glandular cavity, darkened areola and enlarged breast volume. At the end of pregnancy, the breasts can reach 400-800 grams.
Nursing rule: breast massage during pregnancy. After 6 months of pregnancy, the method is to hold the breast by hand, massage from the bottom of the breast to the nipple, and knead the nipple to increase toughness. This is conducive to the production of raw milk, so that the milk delivery pipe is smooth and the milk secretion is smooth.
Lactation: within 2~3 days after delivery, under the action of prolactin, the secretion activity of breast lobules increases, and milk is secreted alternately, which makes the breast expand rapidly and become firm. With the establishment of regular breastfeeding, breasts will be regularly filled and emptied, and then filled and emptied.
Nursing rule: postpartum milk is easy to deposit, leading to breast nodules and even acute mastitis. Before each breast-feeding, rubbing or hot compress on the breast will help clear the breast passage. When breastfeeding, let the baby suck more uncomfortable breasts, which can promote the improvement of breast diseases.
"Menopause": As the hormones secreted by the ovaries begin to decrease, the stimulation of the lack of estrogen in the breast gradually shrinks, the glands are gradually replaced by adipose tissue, and the breast volume becomes smaller. Even if it increases, the fat is also increasing.
Law of nursing: At this time, the incidence of breast diseases is increasing, and professional examinations should be done regularly. If you suddenly feel abnormal, breast size and shape change, nipple discharge, etc., please see a doctor immediately.