In the course of the menstrual cycle, the breasts are enlarged by premenstrual drinking water retention and momentary expansion as affected by switching hormone concentrations.[fifty five] Actual physical alterations to the breasts in many cases are recorded inside the extend marks of the skin envelope; they might serve as historic https://grok.com/share/c2hhcmQtMw%3D%3D_21b4ddf4-c274-418a-a078-c9d2af4898ff