This is a post from Swale at CEM and I hope it helps.
I currently have all my guys using HCG on two consecutive days EACH week--both my AAS and my HRT patients. The HRT guys use it at 250iu per day, and AAS at 500iu. However, both will increase that until they achieve the desired effect. I NEVER prescribe more than 1000iu per day, and I think anyone who does has failed to recognize how really powerful this hormone is. However, although it is the treatment of choice for secondary (hypogonadotrophic) hypogonadism, I no longer use it for same. Why? Because I have yet to find a single patient who was really happy while on it as sole HRT therapy. Strangely, when I have measured serum T levels, a level while on HCG did not satisfy them, wheras THE SAME level might if it comes from the Upjohn test cyp I provide. I haven't figured out why yet, but it sure does seem to be the case. Alternatively, a guy may need 1000iu each day to be happy, and I just don't like anyone doing that much, because it would be every single day. Also, that would require two subQ injections (as 1/2 cc at a single injection is about it for comfort), and complience becomes an issue (HRT patients are not as, shall we say, motivated, as are AAS athletes).
I feel that keeping the testicles up to snuff makes recovery go that much faster at the end. Because HCG will add inhibition (for the same reason as the now-infamous Cy Wilson debate) I don't like to see guys use it much later than a few days after their last shot.