There is also significant variation in sizing amongst folks. Long-lasting breast expansion in the course of puberty is caused by estrogens along with The expansion hormone. Feminine humans are the one mammals that completely establish breasts at puberty; all other mammals produce their mammary tissue during the latter period of https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb