Why transplanted hair may persist
Hair restoration commonly uses follicles from areas that are relatively resistant to androgenetic hair loss. Those follicles may retain important characteristics after transplantation, which is the basis of donor dominance.
This does not mean every graft will grow, every transplanted hair will remain unchanged, or every patient will have the same long-term course.
Growth and appearance can vary
Surgical handling, tissue health, healing, scarring, blood supply, medical conditions, smoking, aftercare, and individual biology can influence growth. Hair calibre and ageing can also change the visible result over time.
Native hair can continue to thin
Transplanted follicles and the patient's existing non-transplanted hair are different parts of the long-term picture. Continued loss around transplanted areas can change coverage and may require medical discussion or future planning.