This document discusses hair transplantation procedures. It describes that hair transplantation involves transferring terminal hair follicles from the back and sides of the scalp, which are resistant to balding, to the frontal scalp area. The two main techniques are FUE, which extracts individual follicular units, and FUT, which extracts a strip of tissue containing follicular units. FUE is now more common as it does not leave linear scars and allows patients to return to normal activity sooner with less pain and bleeding compared to FUT. Potential risks of hair transplantation include complications affecting the donor or recipient area such as necrosis, cysts or folliculitis. New devices aim to improve the precision and reduce trauma of extracting follicular units.