Testosterone Replacement therapy question

Is this true what I read online about testosterone replacement therapy?  ( I cut and pasted it below )  That once you start taking it by injection your body can seldom reverse and start making testosterone on its own again, but the topical application can be reversed by simply stopping use of it to get your body to start making its own testosterone again?  Also, is it safe to add the HCG hormone and will it help the body make its own testosterone again?  Will losing weight and getting fit increase natural levels of testosterone once it has started to go down?

Does testosterone replacement stop a man's own production of testosterone? What is HCG?
Some forms of testosterone replacement such as injections of long acting synthetic testosterone derivatives will virtually stop an individual's own testosterone production at the same time causing severe testicular atrophy that, after as short a time as six months, is only partially reversible. However, daily cream administration of testosterone will cause only partial suppression of the testicular production, which is reversible on cessation of treatment. Even this minimal suppression of testosterone production can be eliminated by co-administration of hCG. hCG is a hormone that is virtually identical to LH, the hormone that controls testosterone production by the testicles. This co-administration of hCG then increases your own natural production of testosterone.