A megasession, as defined by Hasson & Wong, is any hair transplant surgery requiring 3000 or more grafts. Hair restoration patients with more advanced patterns of hair loss usually desire to have the maximum number of hair grafts transplanted in as few surgeries as possible. The advantages of megasessions include: one pass results, better graft yield and survival, less donor scarring, less downtime, and maximum value. Most clinics require 2 or more sessions to achieve the same results Hasson & Wong regularly acheive in one surgical session.