Breast development is a vital part of puberty in the human female. Unlike other mammals, however, human females are the only ones who develop full breasts long before they are needed to five their offspring.
Normal Breast Development and Changes
Breast development occurs in distinct stages, first before birth, and again at puberty and during the childbearing years. Changes also are to the breasts during menstruation and when a woman reaches menopause. Breast begin to form during fetal development, with a thickening in the chest area called the mammary ridge or milk line.
By the time a female infant is born, a nipple and the beginnings of the milk-duct system have formed. Breast changes continue to occur over the lifespan, with lobes, mia lina first anal small subdivisions breast breast tissue, developing first. Mammary glands develop next, and consist what lobes.
Mammary glands are influenced by hormones activated in puberty. Development or shrinkage the the milk ducts is the final major change that occurs within the breast tissue.