Hair transplantation is permanent because the transplanted hair are resistant to DHT hormone that causes hair loss for the same reason they will not thin and fall out in the future. Depending on your hair loss and stage of baldness Dr.Feroz Khan may recommend you to go for LLLT (Hair Grow Laser) or may prescribe Minoxidil-based combination treatments, or Prescription of Finasteride to help maintain non-DHT resistant hair and prevent future thinning and miniaturizing leading to alopecia.