Questions about hair thinning. (Age 22)?

Having a family history of hair loss, I've looked into all the options for thinning hair. If you have thinning hair on the top or front of your head like you said before, your best bet for regrowing anything is Propecia. Rogaine seems to only have any real success for regrowing hair in the back of your head as in your brother's case. Rogaine does run the slight risk of losing your hair at first, but its nothing substantial. The active ingredient in Rogaine takes awhile before you begin to see regular full shafts of hair come in. So at first you would see your hair grow in thin and fuzzy but over time as long as you keep using it, it would grow back. But as I warned before the only real success seems to be for the back of your head around the crown. Propecia has a much stronger active ingredient which I've heard can lower your sperm count, but I haven't heard anything about permanent impotence. This is the only drug I've heard of where users report having regrown hair in the front or top of their head. The only problem with the drug is over a long period of time the active ingredient's effectiveness begins to wear off, and the hair you might have grown back will eventually fall out again. Unfortunately it seems the only permanent solution is hair transplantation, which is much more costly and hard to find a doctor who's good at it.