Breast augmentation is a cosmetic procedure that uses implants to enlarge and shape the breasts. Many women who choose to have breast enhancement surgery do so to improve their self-image. Some feel dissatisfied because their breasts never developed to a size that meets their expectations, while others look to bring balance to a breast that is somewhat smaller than the other. Often, women look to breast implants to restore their natural breast volume, which may have decreased as a result of pregnancy, weight loss or aging.