Exactly, Dr. Umar, this could explain why dr. Gho keeps the donor area with little gapping after extractions, and thus he is able to claim “donor regeneration”.
He could be extracting only part of the follicular unit, and leaving some follicles behind to allow for “regeneration”.
And this would explain why the donor “regeneration” occurs in just 1 week. Basically, because the follicles were not removed at all.
This would mean that dr. Gho, would extract basically only 1-hair grafts, and 2-hair grafts. And not 3 or 4-hair grafts.
In fact, on Gho’s videos, the petri dishes appear with only 2 sections filled with grafts. One section is possibly for 1-hair grafts, and the other section is for 2-hair grafts.
This is the petri dish, containing the grafts, during implantation on the recipient side. Just 2 sections.

And here is another picture taken by patient qw123 of the petri dish:
http://www.hairsite.com/hair-loss/forum_entry-id-88964.html
» I will caution against the promotion of falsehood. What is presented as
» hair multiplication by FUE is manifesting as basic FUE.
»
» The hairs in a 3-4 haired follicle may exit the skin in any of the
» following manner:
»
» 1. Closely bunched together.
» 2. Arrayed linearly
» 3. More widely dispersed.
»
»
» When the later group is extracted with a small sized punch by basic FUE,
» the tendency is to remove 1 of 3 or 2 of 3 hairs off the 3-haired-follicle.
» This is not dissimilar to the concept of graft splitting that is a known
» practice in strip HT. The difference is that follicle splitting by strip
» surgery is more efficient since it is done under direct microscopic vision.
» Doing so by basic FUE which is not under direct vision is a hit and miss
» proposition and thus inefficient. In any case when you harvest by FUE 2
» hairs out of a 3-haired-follicle, the remaining 1 hair that was left behind
» may regrow. If it is partially transected, it may manifest as wispy hair or
» not grow at all.
»
» Additionally, sometimes what is seen by the naked eye as a
» 3-haired-follicle may be a 4-haired-FU whereby the extra hair missed by the
» naked eye was actually in telogen. In the scenario of FU splitting by FUE,
» a lurking hair in telogen might regrow. All this would culminate into the
» appearance of donor hair regrowth.
»
» Needless to say, there is no hair multiplication going on in any of the
» aforementioned scenario. To present this as hair multiplication of any kind
» would be misleading. However, it may be an innocent mistake out of
» ignorance and not a deliberate attempt to mislead.
»
»
»
»
»
»
»
» » » » Dr Umar very very good result but please do consider to get in touch
» » » with
» » » » Gho some time 
» » »
» » » Is there something in particular you want us to discuss?
» »
» » Jep the chance for an infite or lets say expanded donor area with HST,
» » right now a lot of patients are showing up with very good results and i
» » think that in the right hands, this will be the best solution.
» »
» » You can just check Wesley SNeijder for instance he had a HST done