New hair growth will only break through the skin at three to four months after the procedure. However, it will take at least six to eight months for the new hair to make any significant cosmetic difference to your appearance. Although a full result may take as long as 18 months to be achieved, most will attain this at 12 to 14 months. Sometimes, a result may take longer to show when working with scars or filling in a previously transplanted area.