This is a ten-year postapproval study to evaluate the long-term clinical performance of Sientra Silicone Gel Breast Implants under general conditions of use in the postmarket environment.

Inclusion Criteria:

1. Genetic female with US residency
2. Is at least 18 years old for primary or revision reconstruction or 22 years old for primary or revision augmentation
3. Agrees to Sientra study requirements

Exclusion Criteria:

1. Has an active infection anywhere in body
2. Has active cancer without adequate treatment
3. Currently pregnant or nursing
4. Has any condition or diagnosis that, in the investigator's opinion, would negatively affect ability to complete study requirements
5. If control participant, has undergone breast implant surgery with silicone gel-filled breast implants

Women who receive Sientra Silicone Gel Breast Implants for augmentation, revision augmentation, reconstruction, and revision reconstruction. Control participants are candidates for and undergo aesthetic surgery other than implantation with Silicone Gel Breast implants.