[Does Breast Size Matter?] [Puberty]

Stages of Development

Stage 1
Age 0-8
The preadolescent breast consists of a small, elevated nipple with no significant underlying breast tissue.            

Stage 2
Age 8-14 (usually 11-12)
Breast bud stage; elevation of the breast and nipple as a separate small mound; the areola (the area around the nipple) begins to enlarge, and milk ducts inside the breast begin to grow.

Stage 3
Age 9-15 (usually 12-13)
Enlargement and elevation of the breast and areola (less separation), the areola begins to darken in color, and the milk glands begin to grow.

Stage 4
Age 10-16 (usually13-14)
Projection of the areola and nipple to form a secondary mound.

Stage 5
Age 12-19 (usually 15)
Mature adult breast, projection of the nipple.                                                                       

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Things to expect

Your breasts may feel tender, sore, or uncomfortable during puberty.
Your breasts may give out a little bit of milk as they're growing.
One breast might develop faster than the other.

These differences will eventually fad out, and your breasts won't feel as tender.

Because your breasts are new, and not everyone will get them at the same time, they may get a lot of attention. Keep in mind that everyone's breasts are different, no matter their shape or size, your breast are a unique part of you.

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Breast Anatomy

     Breast shape is determined by the amount of Fatty Tissue it contains. Breasts are made up of Fatty Tissue, Milk Glands, and Milk Ducts (carries the milk from the gland to the Nipple).

     Nipples come in all shapes, sizes, and colors. Some girl's nipples get hard and stick out when they're cold, or when they're aroused. Some girls have inverted nipples; inverted nipples stick inward instead of outward.