fig4

Figure 4. Long-term monitoring of the first hair cycle. Repeated imaging of hair production by the grafts reveals the length achieved during the first cycle, i.e., at 18 months post-grafting [3 cm rulers; white in (A) and black in (B)]. Both the forearm and hair are shown (A), with a higher magnification view in (B). Four red dots indicate the hair produced by the proximal graft, while three blue dots point to the barely visible hair produced by the distal graft. The total visible length of the scalp hair shafts remains significantly below the expected 18 cm fibers that would typically grow in 18 months from donor scalp follicles in situ.