A<unk>  is a prosthesis used to enlarge the size of a woman's<unk> s (known as<unk>  augmentation,<unk>  enlargement, mammoplasty enlargement, augmentation mammoplasty or the common slang term boob job) for cosmetic reasons; to reconstruct the<unk>  (e.g. after a mastectomy; or to correct genetic deformities), or as an aspect of male-to-female sex reassignment surgery. Pectoral<unk> s are a related device used in cosmetic and reconstructive procedures of the male chest wall. According to the American Society of Plastic Surgeons,<unk>  augmentation is the most commonly performed cosmetic surgical procedure in the United States.  In 2007, 347,254<unk>  augmentation procedures were performed in the U.S according to statistics collected by the American Society of Plastic Surgery.
There are two primary types of<unk> s: saline-filled and silicone-gel-filled<unk> s.  Saline<unk> s have a silicone elastomer shell filled with sterile saline liquid.  Silicone gel<unk> s have a silicone shell filled with a viscous silicone gel.  There have been several alternative types of<unk> s that were developed, such as polypropylene string or soy oil, but these are no longer manufactured.
Breast implant
Breast reconstruction
Hormone therapy
Breast pump
Gynecomastia surgery
Breast reduction
Paget's disease of the breast surgery
Breast cancer surgery