Breast augmentation plastic surgery is one of the most common procedures performed annually by members of the American Society for Aesthetic Plastic Surgery. Women may choose to under go breast enlargement surgery for various reasons. These personal reasons may center around breasts that are perceived to be under developed, or because of differences in the sizes of the breasts or from changes after pregnancy or breast feeding. Some women may be happy with their breasts but just want them made fuller. Often after weight loss, aging or childbirth a woman's breast volume and shape may change. This too can lead to a woman to seek a breast augmentation. Breast implant surgery performed by cosmetic plastic surgeons is the most popular way to improve breast shape and size. Breast enhancement using breast implants can give a woman more proportional shape and may improve self esteem.