You can find also considerable variation in dimensions among individuals. Everlasting breast growth through puberty is brought on by estrogens at the side of the growth hormone. Female individuals are the only mammals that completely develop breasts at puberty; all other mammals build their mammary tissue in the latter period https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb