Found an intresting study on males on Test using difrent doses of HCG and placebo.
http://jcem.endojournals.org/cgi/con...ract/90/5/2595
Reading this makes me think HCG should always be used on cycle. And dosing 300IU e3d seems to be a good dose for around 100% ITT levels and thus function, and this low dose shouldnt desensate any Leydig cells?