After how much time does shock loss start post FUE? Does all the implanted hair fall out during shock loss? (photo)

There is a distinction between shock loss and loss of the grafts after a FUE transplant.   The immediate loss of the transplanted grafts is expected starting around 2-3 weeks after the procedure.  Shock loss occurs when the native , non-transplanted hairs, fall out after the procedure.   

Shock loss is due to the loss of normal hair whether it is from donor site or recipient area.  It can occur with both FUE and strip procedures.  Usually if it occurs it will take place in the recipient area.  
Shock loss from hair transplant can occur due to the following:
Anesthesia-  excessively long procedures taking longer than 12 hours can induce shock loss more likely.  the repeated use of lidocaine, marcaine, and perhaps most importantly epinephrine can affect nourishment of the hairTraumatic harvest-  In strip surgery, traumatic harvest can induce shock loss.  Recipient area trauma- during the incision making process the hairs are either crushed or cut and damaged during the process.Ways to minimize shock loss are as follows:
Improve recipient bed and donor area environment.  Make your recipient environment improved by addition of growth factors and/or PRP to help reduce incidence of shock loss to native hairs.Use of Rogaine and Propecia- can help miniaturized hair become more stable and less likely to fall out during procedure9xRobotArtas-  The latest version of the robot can make recipient sites and can determine angle of existing hair and help ensure that the angle will not damage existing hair.  Especially helpful in patients where you are transplanting hair to create densityMinimize anesthesia time and procedure time- We limit number of grafts to a safe number per session.  Extended anesthesia periods and harvest times can cause patients to have a higher chance of shock loss.  The 9x Robot harvests between 1000-1500 grafts per hour making it superior to previous additions and traditional FUE approaches.Best,
Anil Shah

Shock loss after a hair transplant surgery may happen days to weeks after surgery.  If you are concerned it is best to contact your doctor. 

Shock loss is not shedding of the grafts but rather loss of the native hair that is in the area of transplants. This can occur up to 8 months after the transplant

If you haven't experienced shock loss by this point, you most likely won't. Shock loss is actually not that common . If you are talking about the transplanted hairs, they will most likely fall out around week 2-3, but will start to grow back in the 3rd month.