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

Have you stop minoxidil 5% ? It's not expected for a hairloss pos top  6month
You should contact your surgeon.

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 .

You definitely need this examined. PRP injections would be a good option but you should have a proper examination with a hair transplant specialist. 

Sagar Patel MD

You may have several issues that are occurring simultaneously, including continued male pattern hair loss at the transplant site, miniaturization of the transplanted hairs, and/or shock loss (less likely). If you cannot reasonably visit your hair transplant surgeon, I recommend consultation with a local hair transplant specialist who can examine your scalp to evaluate the most likely major contributing issue. Until then, stay on the recommended medical management plan of your hair transplant surgeon.

Its important for you to follow up with your hair restoration doctor again in the future. 

You may be having an extreme form of disruption to your natural hair growth cycle. It could also be miniaturization, shock loss, or your donor hair may not have had very strong density. 

Keep and eye on your situation and possibly seek a second opinion. 

You need to have your donor area examined for a condition called miniaturization which sometimes happens and if it does, will impact a hair transplant recipient area