The procedure of stem cell therapy starts with removing stem cells from your body or from the donor’s body. The cells are collected from different body parts depending upon the need. After collection, the cells are processed according to the purpose for which they are extracted. The processed stem cells are injected into the specific area of your body using ultrasound or X-ray guidance. Anesthetics are used and the procedure is done under sterile conditions.  It is necessary to make sure that the cells are reaching the desired area so that the improvement is better and quicker. There are three types of stem cell transplant:
Autologous transplant - your own body stem cells are removed and used. This type of transplant is safer and recovery is quicker because chances of transplant rejection are less as your own stem cells are being used.
Allogenic transplant - stem cells are obtained from a suitable donor. Matching is done to find a donor whose white cell antigen closely resembles yours. The donor can or cannot be your relative.
Syngeneic transplant - stem cells from your identical twin are used. In this case, the chances of rejection are low.
Each type of stem cell transplant involves different methods, procedures, and techniques with different side effects and risks. The one suitable for you depends upon your age, health, and physical conditions.