Propecia question

[dazzo]

Hello, new member.

I'm a 22 year old male and have had a receeding hairline since i was about 17. Since I was about 19, I started noticing thinning of the crown (this doesn't seem to have deteriorated in the past 3 years for some reason).

I am considering going on propecia, as I still have hair and I would rather take action now to treat it rather than waiting until I actually have a bald patch in which case the propecia wouldn't bring the hair back anyway.

My question is this - I've read about the initial "shedding" phase in which the propecia will get rid of weaker hair (in my case, in the crown area), so will this cause me to actually have a bald patch on my crown before the hair grows in again?

Advice would be appreciated thanks in advance.