2. What Does Estrogen Do In the Body?

The main role of estrogen is to bring about puberty in young girls, which happens when estrogen circulating in the blood binds with receptors in targeted areas. The result is the start of menstruation and the growth of breasts and pubic hair. Although this is the primary role of the hormone, estrogen affects many other parts of the body as well.

Puberty Mood Growth KatarzynaBialasiewicz / Getty Images

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