Genetics: Facial hair growth is one of the secondary sexual characteristics males encounter when they mature, as is breast development in women. It is largely a result of the specific biologic differences between men and women. For men, the facial hair is sensitive to the effects of increased testosterone which makes it grow and thicken.
Answered 11/23/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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