The breast is at risk of quite a few benign and malignant circumstances. Essentially the most frequent benign disorders are puerperal mastitis, fibrocystic breast changes and mastalgia. Breast tissue starts to form during the fourth 7 days of fetal existence. In the fetus, breast tissue develops alongside two "milk traces" https://grok.com/share/c2hhcmQtMw%3D%3D_21b4ddf4-c274-418a-a078-c9d2af4898ff