It’s important to remember that the fuller the beard, the more grafts you’ll need. For a full beard, a surgeon may need to harvest thousands of hair follicles. Depending on how thick your hair is naturally, it might be difficult to harvest enough grafts while leaving you with a full head of hair.  If you do not have enough hair on your scalp, then there may be a natural limit to the number of grafts available. Talk to your plastic surgeon about your goals to find out if they are realistic. Not everyone is a good candidate for facial hair transplantation, and you may need to scale back your goals if you don’t have much hair available for grafting.