At a national level of 15%, the reoperation rate following augmentation mammaplasty is too high. We are conducting a survey to examine the pre-operative methods by which plastic surgeons determine implant volume, size, shape and location; and to determine if the Mentor "BodyLogic"TM System can successfully improve outcomes. We will evaluate how measurements taken using "BodyLogic"TM influence choice of implant and whether there are any re-operations, particularly for size change. We hypothesize that using this system will help surgeons choose appropriate implants that will decrease the rate of reoperations, especially for size change.