There may be also significant variation in size concerning men and women. Everlasting breast growth throughout puberty is because of estrogens at the side of the growth hormone. Feminine individuals are the only mammals that forever create breasts at puberty; all other mammals acquire their mammary tissue through the latter https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb