Breasts
You develop breasts during puberty. This could start in a girl of 8, but also in a girl of 14. Everyone is different.
Shape and size
Breasts come in all shapes and sizes. Nipples also differ greatly from each other, both in size and color. Often one breast is bigger than the other or has a different shape.
Genetics
Your genes determine the shape and size of your breasts. If the women in your family have large breasts, then you will probably develop large breasts too. If they have small breasts, then you usually develop small breasts too.
Breast interior
Your breasts consist mainly of mammary glands and milk ducts. These end at the nipples. They are responsible for milk secretion when you get pregnant. In addition, your breasts are composed of fatty tissue.
Cycle
The breasts, influenced by hormones, prepare for pregnancy once a month. They get bigger and more sensitive. After your menstruation, they return to their regular shape.
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