How do girls get breasts?
1. Onset of Puberty: Puberty typically begins between the ages of 8 and 13 in girls. It is triggered by the release of hormones from the pituitary gland and the ovaries.
2. Estrogen and Progesterone: The main hormones responsible for breast development are estrogen and progesterone. These hormones are produced by the ovaries during puberty.
3. Growth of Breast Buds: The first noticeable sign of breast development is the appearance of small, firm lumps under the skin of the chest area. These are known as breast buds.
4. Ductal and Lobular Development: Inside the breast buds, there are milk ducts and milk-producing glands called lobules. Estrogen and progesterone promote the growth and development of these ducts and lobules.
5. Increase in Fat Tissue: The breasts also contain fat tissue, which contributes to their size and shape. The amount of fat in the breasts varies from person to person and can influence the final breast size.
6. Areola and Nipple Development: The areola, the pigmented area surrounding the nipple, also undergoes changes during puberty. It may become darker in color and slightly enlarged. The nipples may also protrude more.
7. Breast Enlargement: As the breast buds grow and develop, the breasts gradually enlarge and take on a more rounded shape.
8. Asymmetry: It is common for one breast to be slightly larger than the other during development. This asymmetry usually evens out over time.
9. Menstrual Cycle: The development of breasts and other secondary sexual characteristics typically occurs in conjunction with the onset of the menstrual cycle.
10. Completion of Breast Development: Breast development usually takes several years to complete. It often continues until the late teens or early twenties.
It's important to note that the timing and progression of breast development can vary among individuals. Each girl experiences puberty at her own pace, and there is no "normal" timeline.