Evidence that HCG perpetuates androgen induced shutdown of the HPTA?

[exnihilo]

I was wondering if anyone had any studies to verify this behavior. I ask because it is fairly common for doctors (in california at least, that I know of) to attempt to avoid fully blown hormone therapy in patients with borderline normal low test levels via the administration of 250-500iu of HCG once a week. I understand that the administration of HCG can continue to supress natural LH production, but it appears that LH production bounces back fairly quickly (as opposed to testosterone production), which indicates to me that it might make sense to run HCG much as you would run clomid post cycle, and taper it down gradually.

My understanding of the HPTA and feedback mechanisms of sex hormones is fairly limited, so anyone who has a solid answer to this please step in and enlighten me.