Body Contouring Pre-Op: Candidacy and Weight Gain Medically reviewed by Jennifer Richman on February 22, 2024. When it comes to gender-affirming body contouring procedures such as a hip dip fat transfer or buttock lift surgery, formerly called MTF feminizing body contouring, patients often ask how they can maximize their results. Since the degree to which fat can be transferred depends on the amount of fat available for grafting, some patients try to gain as much weight as possible before a transgender body sculpting surgery. Here we explain why rapid weight gain is not an effective tactic for operations like a BBL as well as when we might recommend a candidate …