Hair Fall After Six Months of Hair Transplant? (photo)

Shock loss or normal post-transplant shedding would both be very unusual six months after surgery.  It is possible to have continued loss of the normal surrounding hairs due to male pattern baldness, and this may be the reason that finasteride, minoxidil, and biotin were recommended.  The photos provided do not show a clear timeline of events, so it is difficult to say, but they do seem to show significant thinning that would warrant further evaluation with your hair restoration specialist.
All the best,

If you are concerned please follow up with your doctor for an exam.
You will have hair loss after surgery for several weeks to months. You may have graft loss after surgery. Not all the grafts will take. You won't really know until you see results in 6 to 12 months.

It is normal for the newly implanted hairs to shed around four weeks after the surgery. However, at six months post transplant, all graft-related loss should have taken place already. This is the time when your new hair should be growing in. Experiencing a continual loss of 50 to 100 hairs per day is normal—it’s a part of the healthy growth cycle of hair. But much more than that is unusual and should be looked into further.

You may lose some transplanted hair during the recovery phase.  Propecia and /or Minoxidil can be used depending on your surgeon's preference.  It appears that your density may be lacking a little but this is because your donor hair may not have the greatest density.  Overall your result is very good.

Dr. ES

If you experience Hair loss after a Hair Transplant Surgery, first you must identify if it’s the transplanted hairs or native hairs. Transplanted hairs shed over two to three weeks and starts to re grow after three months. The native hairs could fall in the immediate post operative period because of shock loss from surgery. If the quality of these hairs are good they may the grow. However if they are miniaturised hairs they may not grow. If you experience Hair loss six months or later after hair transplant it could be Progressive manifestation of your Androgenic Allopecia .