Ludwig scale
The three-stage classification of female pattern hair loss.
A three-stage scale describing diffuse thinning along the central parting, which is how pattern loss usually presents in women. Unlike the Norwood scale it does not describe a receding hairline, because the frontal line is typically preserved.
Related terms
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Anagen phase
The growing phase of the hair cycle.
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Crown (vertex)
The whorl at the top and back of the head.
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DHT (dihydrotestosterone)
The hormone that drives pattern hair loss.
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Donor area
The band of hair at the back and sides that supplies the grafts.
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Follicular unit
The natural grouping of one to four hairs that grow together.
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Graft
One follicular unit, moved from the donor area to the recipient area.
