There is also sizeable variation in dimensions between people. Long-lasting breast development for the duration of puberty is because of estrogens at the side of the growth hormone. Woman human beings are the sole mammals that forever build breasts at puberty; all other mammals build their mammary tissue throughout the https://grok.com/share/c2hhcmQtMw%3D%3D_5ad6450c-533d-442c-a09c-9f7bce1babfb