Why do hairs on the back and sides remain?

[2020]

Different Levels of 5-Reductase Type I and II, Aromatase, and Androgen Receptor in Hair Follicles of Women and Men with Androgenetic Alopecia

http://www.nature.com/jid/journal/v109/n3/abs/5610071a.html

Frontal hair follicles in women had 3 and 3.5 times less 5- reductase type I and II, respectively, than frontal hair follicles in men.

[DepressedByHairLoss]

That's a good find 2020, but there really needs to be so much more research done into the phenomenon of hair loss, such as why there are more androgen receptors in the frontal regions of the scalp than in the occiptal regions and also within the entire body (ex. beard, leg, and arm hair are not affected by AGA).

[dda]

I'm 60 and had hair transplant surgery during the early days at a large clinic in Beverly Hills California (1979). I had an exceptionally dense donor area when I was young. As I have aged (from 26 to 60 years old) my donor area on the back and sides of my head has thinned out considerably. I would say I have lost about 2/3 of the original density there. This doesn't happen to all men, but should be a consideration when men are thinking of having hair transplant surgery. My thinning may have been partly or completely due to the numerous shotgun scars I got from that early version of hair transplant surgery. I once posted photos and guys in another forum commented my donor was "shot". Thankfully beard hair and Acell are providing relief to an otherwise depressing situation.

-I work for Dr. Cole's office in Alpharetta, GA and post in the forhair.com forum as CITNews

Lol no offense but you are 60 yrs old and on a bald forum? This is what I don't get. By that time in life I will not give a **** about hair lol.. But when you start balding when your 19, kiss that confidence goodbye life has certainly not been the same

[BaldinLikeBaldwin]

genetic mutation basically

need some advanced gene therapy to solve this bish of a problem

[35YrsAfter]

Lol no offense but you are 60 yrs old and on a bald forum? This is what I don't get. By that time in life I will not give a **** about hair lol.. But when you start balding when your 19, kiss that confidence goodbye life has certainly not been the same

I remember a time when I thought 30 was old. At 60, I care much less about having a teenage head of hair. In fact, I really don't mind having thinner hair at 60 at all. Living with evidence of previous hair transplant surgery is another story entirely. That is unacceptable at ANY age in nearly all cases. Wanting to look one's best doesn't just disappear when you reach a certain age. I still try to look my best.

[NotBelievingIt]

While I don't subscribe to the galea theory as the only thing for baldness, its obvious it isn't, but overlooking the perfect match up of the galea with hair loss suggests that there must be a correlation.

I would be most curious if DHT sensitivity is developed over time, or is it basically there from birth? If its actually developed as time goes on, what is triggering it in the first place?