here is some hcg info for you
Also important to take into account : using HCG for too long a period of time or in doses that are excessively high, can desensitize the testicles to the effect of LH and would put your right back where you started from. Basically that would mean you spent money to no avail. In terms of side-effects one should expect some androgenic signs such as acne and there is a risk for hair loss or prostate hypertrophy, but in most cases this compound will be used for 3-4 weeks, so these should not manifest themselves to any serious degree. There will also be some estrogen build-up, but since the user HAS to be on clomid or Nolvadex, this should not become apparent either. Next to this, HCG being a fertility drug, one should be aware that increased blood pressure and blood clotting can occur. HCG is clinically used to make women ovulate, or to invoke birth in pregnant women.
this is from Big Cat's Steroid Page a good site with tons of info about all kinds of gear.
I would suggest the reason not to use hcg for anything more than recovery is for the over use and that it to can be suppressive.