Can cause the nipple and areola color deepened. 2, Some physiological changes may also lead to modifications in large from the nipple. Pregnancy generated increased estrogen and progesterone. Women after pregnancy, Starting from early pregnancy, the nipple and areola color deepened, by turns crimson through the light brown. Some women (under 3 decades old -45 years of age), the situation even without the pregnancy. Nipple and areola color deepened slowly. This color change suggests women now have “one off"with the increased estrogen.