The hormones produced during pregnancy and breastfeeding affect the nipples and areolas, in addition to the breasts themselves. Often the areolas enlarge and become darker, a change that is often permanent. As the breasts enlarge with milk production and the baby breastfeeds (or you use a breast pump), the nipples and areolas can stretch and enlarge – often unevenly. Breast enhancement procedures such as a breast lift, nipple reduction, or breast reduction can restore a balanced, attractive shape. You should allow your breasts to return to their pre-pregnancy state, which takes approximately 3 to 6 months, before you have surgery.