Hair transplantation is a surgical technique that allows us to recover hair in areas where it has been lost. The operation consists of extracting groups of hair (follicular units) from certain areas of the body (donor areas) to transplant them to areas where there is no hair. The operation consists of extracting groups of hair (follicular units) from certain areas of the body (donor areas) to transplant them to areas where there is no hair. The supposedly new and revolutionary techniques that some hair clinics promote as a claim, are merely new instruments that make it easier or less easy to implant hair in certain areas and/or conditions (more hair at the same time), depending on the characteristics of the transplant.