Hi it is a very daunting experience having a HT and no clinic I know of will guarantee a result. You can only do you due diligence and research, research, research and find a Dr. you trust to work on your hair. The longer you leave it especially without any medication regaine finasteride etc the worse your donar will be. That's just my opinion. Hopefully someone with more experience can give you the answer your looking for. But sometimes we regret not taking action. Personally I've had my HT yesterday. I was considering it for long enough and I'm glad it's done. I've no idea how the end result will be but fingers crossed its the result I want. But sitting in the Drs office they do make you sign a form acknowledging there is no guarantee.