what is NW1, 2 , 3,4

[eseller01]

i know i am very novice but just curious never heard of that term i know it is the measure of a hairloss but just curious to know how much is Norwood 1,2 and 3.

 

[beaner]

http://www.gourmetstylewellness.com/research/men/step2men.htm

This link will take you to the page from this site depicting the Norwood scale.