During the menstrual cycle, the breasts are enlarged by premenstrual drinking water retention and temporary advancement as influenced by shifting hormone ranges.[55] Breast tissue commences to variety inside the fourth 7 days of fetal lifestyle. During the fetus, breast tissue develops along two "milk strains" that start out with the https://grok.com/share/c2hhcmQtMw%3D%3D_21b4ddf4-c274-418a-a078-c9d2af4898ff