As the title says... after years and years I have figured out this vicious cycle and I do not understand it. Every 6 to 9 months my libido just tanks and I need to go on HCG monotherapy for 3/4 weeks at 1000iu MWF. My sex drive begins to build by the end of week 1 and then comes raging back towards the end of week 2. I keep this going for another week or 2 then resume TRT at 50-70mg + 500iu HCG e3.5d and am great for another 6 to 9 months and then the cycle repeats. Does anyone know wtf is happening here and how to fix this? My guess is that it has something to do with my other hormones that TRT is shutting down and it takes 6 months to turn out the lights even though I am using 500iu e3.5d during TRT. Any ideas? I know that Lipschultz was an advocate of this in his papers to "keep TRT working" but I dont know what he meant by this.