Generally, we suggest that our patients have a PRP injection 2 to 3 weeks prior to a hair transplant. If they have not had one prior to surgery, then they should wait at least four weeks before they have a PRP treatment. Typically they should have another treatment in six months and then one at a year following surgery. The benefits that I have seen are faster growth of the transplanted hair and even new growth of the existing hair that is in a dormant stage. All in all, I feel that the PRP treatments are worthwhile, but the hair transplant procedure if done skillfully by someone with lots of experience is successful by itself. Our usual technique is with the NeoGraft, and our patients are elated with the results. About 20% of the patients will get PRP treatments. Thank you for your question and best of luck to you.