Room growth experience different time

The breast is the mammal common characteristic,general pair growth,both sides symmetry. The human mammary gland only has in front of the chest one right,originates in the ectoderm. Since birth,breast growth experience infancy,puberty,natural mature period,gestation period,breast-feeding period as well as menopause and so on different time. In each different time change,the organism internal secretion hormone horizontal difference is very big,its influence,breast growth and physiological function also unique

. In infancy,in newborn time,because the parent substance female hormone may enter young baby in vivo through the placenta,causes the mammary gland organization proliferation,60,appears the nipple next 1~2 cm size the induration,and has the few milk type Material secretion,along with parent substance hormone gradually metabolism,this kind of phenomenon may be born the latter 1~3 weeks to vanish voluntarily. Here need points out is,being sure not extrudes the nipple with the hand,in order to avoid creates the infection. Our country some area popular such custom,after namely the newborn is born all extrudes the nipple,otherwise thought can create the nipple to be hollow,this kind of understanding is unscientific,the procedure also may not take,creates the nipple hollow reason is the embryo time mammary gland growth is unusual,but is not because has not extruded the nipple. In babies and infants time,the mammary gland basically is at " the static " condition,the gland assumes the degeneration,the male is completer compared with the female. From puberty start,each kind of endocrine hormone influence,the feminine breast entered in the life the physiological growth and the function moves the most active time,until menopause. After has experienced the puberty,the mammary gland organizational structure has hastened the consummation,entered the mature period mammary gland. In each menstrual cycle,along with ovarian hormone hormone periodic variation,the mammary gland organization is also having the again and again proliferation with the change which restores old ways. The gestation period and the breast-feeding period are woman of child-bearing age's special physiological times,this time the mammary gland for adapts this special physiological demand,but has had a series of changes. Alienates oneself the menstrual period to start,the ovarian hormone hormone reduces gradually,the breast physiological activity is weaken day by day. (womimi.net)

This chapterreleased:Breast Health (http://www.womimi.net),detailed reference to the above website.