As long as the fat is alive, it will remain in the body for the rest of its life. Transplanted fat is like a newly planted sapling, which must take root and absorb nutrients if it wants to grow. Fat is just like a sapling, if it wants to stay in the body permanently, it needs to establish blood transportation to provide nutrient supply for it. There is a process for a tree to take root, and the same is true for fat to establish blood transportation, and the three months after the operation is the critical period for it to establish blood transportation. During the recovery period, there will be a small amount of fat absorption, and the volume of fat retained during the recovery period will be more than 70%. This is why good braking during the recovery period is the best aid to improve fat retention. There are three main influences on the absorption rate: 1. Firstly, it depends on the skill and experience of the doctor; 2. Secondly, it depends on the quality of the fat. Thighs, buttocks fat particles are smaller, dense, its lipoprotein activity is higher, the survival rate after transplantation is higher; abdominal fat quality is poorer, the survival rate after transplantation is lower; 3, the amount of each injection. The larger the amount injected each time, the lower the survival rate. The capacity of breast tissue is limited, not too much fat tissue can be injected at one time, otherwise the transplanted fat tissue can not get sufficient blood supply, easy to necrosis.