The major difference between a stem cell hair treatment and classic hair transplantation is that stem cell is not completed in one session. You need to visit your doctor at least four times before your stem cell therapy. During the first examination, your doctor will extract a small scalp tissues with healthy hair follicles from your scalp, and also will withdraw some blood from you. After a couple of weeks of incubation period, a serum containing the stem cells will be injected on to the scalp. This procedure should be repeated at least three times in session 4 weeks apart from each other. Later, the injected stem cells start developing in the injected site. After about six weeks, the patient starts observing the growth of new hair in the injected/balding sites.