The Hamilton-Norwood scale

Baldness appears in different forms and gradually develops. Hamilton therefore devised a scale for all the stages of male baldness, from the mildest to the most pronounced. This scale goes from stage I to VII in ascending order.

Stage 1

No particular signs of baldness.

There is therefore no need to have a transplant.  

Stage 2

The hair at the temples and the front becomes recessed, and the front hairline recedes.

=> A micrograft procedure can be performed to remove the appearance of a receding hairline and give an excellent aesthetic result.

Number of grafts: 500 to 600 grafts, or around 1800 hairs.
Number of sessions: 1 session, the duration varies

Stage 3

The hair at the temples and the front becomes recessed, and the front hairline recedes. A toupee shape forms in the middle of the head.

=> A micrograft procedure can be performed to remove the appearance of receding hair and fill the hole in the middle of the head. The result looks perfect and natural.

Number of grafts: 600 to 900 grafts, or around 2,500 hairs.
Number of sessions: 1 session, the duration varies.

Stage 4

More hair is lost from the whorl area, and only fuzz is left.

=> A micrograft procedure can be performed to fill the hole in the middle of the head. The result looks perfect and natural.

Number of grafts: 1,100 to 1,300 grafts, or around 3,800 hairs.
Number of sessions: approximately 1 to 2 sessions.

Stage 5

No hair is left at the front or on top of the head, but fuzz is left.

=> A micrograft procedure can be performed to fill the area at the front and on top of the head. The result looks good but not perfect.

Number of grafts: 1,200 to 1,600 grafts, or around 4,500 hairs.
Number of sessions: approximately 2 to 3 sessions, depending on the hair density in the donor area.

Stage 6

No hair is left at the front or on top of the head.

=> A micrograft procedure can be performed but will not be able to completely cover the baldness.
A consultation is necessary to assess the hair density in the donor area and see if a micrograft is possible.

Stage 7

The frontal and whorl area are bald. The baldness reaches the nape of the neck, where a thin crown forms.

=> A micrograft procedure is probably impossible because the donor area will certainly not be dense enough.

A hair transplant is now the most effective solution to give real, quick and natural results to your hair. 

It should be noted that this procedure can be performed at all stages of baldness. It is moderately effective in the most advanced stages of baldness because when baldness is more pronounced, there are fewer grafts to collect, and the area that can be covered with the grafts is smaller.

Baldness develops gradually, and can start at the age of 18. As soon as androgens start to be produced at puberty, a young boy can show signs of baldness. In addition, if a young man is in the early stages of the Hamilton-Norwood scale (with hair starting to recede at the temporal lines, and thinning at the top edges of the crown), it is certainly likely that he will develop severe stage VI or VII baldness at an older age.

In any case, the younger a person is, the less advanced the baldness is (it is referred to as incipient baldness) and the larger the donor area will be (between 300 and 350 hairs per cmยฒ). Also, if the top edges of the crown are not thinning and the frontal and temporal hairlines are not receding, a successful hair transplant can be guaranteed with perfectly natural and aesthetically-pleasing results.

In the best cases, when slow-developing incipient baldness is diagnosed, we recommend some simple micro hair transplant sessions, spread out over a lifetime.

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