Jump to navigation. Breast development is caused by hormones released by the ovaries at puberty. These hormones cause fat to accumulate, causing your breasts to enlarge. The first sign of breast development is slight swelling under the nipple, a stage of development called breast buds.
Stages of Breast Development
Breast-feeding vs. formula-feeding: What's best? - Mayo Clinic
There is very little actual breast tissue present at birth, although a few days after birth it is not at all unusual for babies to produce what is referred to as 'witches milk' from their nipples. This is said to be caused by the strong influence of the mother's hormones just before delivery, and then the milk is not present again until other conditions later in life cause lactation to start up. Females reach a certain time during which their breasts begin to develop further. Along with the appearance of pubic hair and other "secondary sexual characteristics" , this usually begins one or two years before menarche' first menstrual period. When breasts develop they go through five individual 'stages' that have been described by Dr. Tanner, a British doctor.
Breast development in the newborn
Breast development is usually one of the first signs of female puberty. It can occur between the ages of 8 and 13 for girls and is the result of increased estrogen levels. Breast development usually continues throughout the teen years, and can vary from person to person.
Breast milk is considered the ideal diet for newborns. It has the right amount of calories, fat, and protein to support overall physical and neurological development, it provides a source of iron more easily absorbed in the body than the iron found in dietary supplements, it provides a resistance against many diseases, it is more easily digested by infants than is formula, and it helps babies make a transition to solid foods more easily than if bottle fed. Department of Health and Human Services, a in Berk, However, most mothers who breastfeed in the United States stop breast feeding at about weeks, often in order to return to work outside the home.