This involves the liposuction of adipocytes from the thigh, waist or abdomen of patients. Abundant fats are injected layer by layer to buttock depression areas after purification and mixture with growth factors to replenish lost tissues and sculpt a relatively plump buttock shape. The advantage of this surgery is the easy and economic source of fats and the absence of the emplacement of an artificial prosthesis to avoid complications like foreign body reaction or displacement. Nevertheless, as buttocks are subject to frequent activities and compression every day, injected fats are predisposed to distinct self-absorption, so a relatively large volume of fats needs to be injected to prevent premature loss as a result of fat absorption. Moreover, as adipocytes can only fulfill the objective of filling or plumping up due to their characteristics and density, they are less likely to enhance buttock support and projection; thus, this method is not suitable for patients with congenitally flat buttocks or aging-related buttock droopiness.