Age 20s
At the time of puberty when the body of a teenage girl's first produce estrogen in sufficient quantities, her breasts will grow rapidly, forming two connective tissue framework and the system of glands, ducts, blood vessels, lymph nodes, and nerves. Taken together, the breasts also develop fat cells that form clots breast gland.
Breasts are also more quickly affected the force of gravity. To prevent this, wear a bra that could support the "assets" you are perfectly.
Age 30s
During pregnancy, your breasts will gradually enlarged. It may be the weight of both breasts will grow as much as half a kilogram. Stretching the skin around the breast due to weight gain can also interfere with collagen production making skin around the breast become loose, especially after childbirth.
Perform breast self examination once every month. If your mother or your sister have a history of cancer, perform mammography at the age of 35 years.
Age 40s
Although you have never been pregnant and given birth, in this age of milk-producing glands (lobules) will shrink so visible sagging breasts. Drastic weight loss can also make visible sagging breasts due to the layer of fat on the breasts to shrink. Push-up bra can get around it. Mammography is recommended once a year.
Age 50s
At the time of menopause, changes in the breast that usually occurs during the menstrual cycle does not happen again. However, the risk of breast cancer will increase with age. Breast examination becomes even more important after menopause.
So,..check your breast for your healthy breast.
Source : Msnbc