Whether there is congenital breast asymmetry, uneven breast height, developmental deformity of the sternum, underdevelopment of one breast, or any other differences between the two breasts that implants cannot fix, autologous fat transfer can be used to improve one or both the breasts, making the two breasts nearly identical in size and shape. The advantage of this procedure is that it does not require implants and provides a better and safer choice for those who desire symmetry but not size increase. It can also make more detailed adjustments that implants cannot achieve. However, patients would need to have sufficient body fat for liposuction. In addition, because the affected (smaller) breast also usually has poor circulation and tight skin, which may result in a low survival rate of the transferred fat, the detailed evaluation of patients’ fat condition and breast deformity before the surgery and careful selection of surgical method are needed to obtain better correction results.