Natural Hair Restoration

The Norwood classification is the most widely used classification for hair loss in men. Published in 1975 by Dr. O’Tar Norwood, it defines two major patterns and several less common types. In the regular Norwood pattern, two areas of hair loss – a bitemporal recession and thinning crown – gradually enlarge until the entire front, top and crown (vertex) of the scalp are bald.

Class I represents an adolescent or juvenile hairline and is not actually balding. The adolescent hairline generally rests on the upper brow crease.

Class II indicates a progression to the adult or mature hairline that sits a finger’s breath (1.5cm) above the upper brow crease, with some temporal recession. This also does not represent balding.

Class III is the earliest stage of male hair loss. It is characterized by a deepening temporal recession.

Class III Vertex represents early hair loss in the crown (vertex).

Class IV Is characterized by further frontal hair loss and enlargement of vertex, but there is still a solid band of hair across top separating front and vertex.

Class V the bald areas in the front and crown continue to enlarge and the bridge of hair separating the two areas begins to break down.

Class VI occurs when the connecting bridge of hair disappears leaving a single large bald area on the front and top of the scalp. The hair on the sides of the scalp remains relatively high.

Class VII patients have extensive hair loss with only a wreath of hair remaining in the back and sides of the scalp.

Norwood Class A

The Norwood Class A patterns are characterized by a front to back progression of hair loss. Norwood Class A’s lack the connecting bridge across the top of the scalp and generally have more limited hair loss in the crown, even when advanced.

The Norwood Class A patterns are less common than the regular pattern (<10%), but are significant because of the fact that, since the hair loss is most dramatic in the front, the patients look very bald even when the hair loss is minimal.

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