Stages Of Breast Development. If your breast size has increased since a year ago it may be that your breast development will continue. By stage 2 breast buds are formed as milk ducts and fat tissue develop.
The earliest sign of puberty in most girls is the development of breast buds nickel sized bumps under the nipple. Girls usually experience their first menstrual cycle at this age. In stage 1 shows the flat breasts of childhood.
Growth of the breasts can be described in steps called tanner stages ranging from stage 1 representing no pubertal development to stage 5 the fully developed mature breast 1 this is a verified and trusted source gender differences at puberty.
Estrogen calls forth fat tissues to grow and accumulate in the breast area along with the milk ducts. It is not unusual for breast growth to start on one side before the other. Girls usually begin puberty between the ages of 8 and 13 years old. This is also referred to as the galactic band.