How many hair grafts do I need? Generally speaking, around 35 grafts are used for each square centimetre – a consultation is needed to determine the exact number of grafts needed for a hair transplant procedure. Are hair transplant surgery results permanent? Hair transplants last a lifetime as the transplanted hair follicles are resistant to going bald and they start growing naturally in the recipient areas. Some patients may experience slight hair loss in the recipient area as they progress through old age. Does a hair transplant hurt? Since anaesthetic is administered before the procedure begins, a hair transplant is practically painless.