Sinclair Hair Shedding Scale
Baseline shedding scores 1 to 3: Normal 4: Borderline 5 or 6: Excessive
Hair Follicle miniaturization in Androgenetic Alopecia
Unlike other areas of the body, hairs on the scalp to grow in tufts of 3–4. In androgenetic alopecia the tufts progressively lose hairs. Eventually when all the hairs in the tuft are gone, bald scalp appears between the hairs.