There may be also significant variation in dimension between persons. Everlasting breast growth during puberty is attributable to estrogens together with The expansion hormone. Feminine people are the only real mammals that permanently produce breasts at puberty; all other mammals create their mammary tissue over the latter duration of pregnancy. https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb