Anagen phase
The growing phase of the hair cycle.
The active growth phase of a follicle, lasting two to seven years. At any moment around 85 per cent of scalp hair is in anagen. Pattern hair loss shortens this phase with each cycle, which is why affected hairs get progressively shorter and finer before they stop appearing at all.
Related terms
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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.
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Hairline design
Where the new hairline is drawn, and at what angle.
