Many thanks, this answers my questions. Particular the section that states that the size of your testicles does not necessary correlate to the abilty to produce testosterone : I quote:
"Note: visually analyzing testes size is a poor method of judging your actual testicular function, since testicular size is not directly related to the ability to secrete testosterone. (4) This is because the leydig cells, which are the primary sites of testosterone secretion, only make up about 10% of the total testicular volume. Therefore, when the testes may only appear 5-10% smaller, the testes ability to secrete testosterone upon LH or hCG stimulation can actually be significantly reduced to 98% of their normal production. (3-5) So do not judge how "shutdown" you are by testicular size!"
The post also suggests that its better to run HCG is small dosages throughout rather than at the end, since you will respond better at this time and that you should not run HCG during PCT. Note I knew that it should not be run during PCT from other articles but yet people still seem to insist on doing this on other forums.
So thanks again.
Glad to hear the article has helped answer some of your questions. Running hCG in PCT is absolutely pointless. The whole goal of PCT is to recover your natural hormonal homeostasis.
hCG is a peptide hormone that mimics LH and will further inhibit LH secretion while it's present in the body. This is why you want to use hCG while on cycle to maintain testicular function, and then drop it a few weeks before your PCT so it clears your body. At that point, you're testes will be primed for LH stimulation and will get you upregulated fairly quickly.
-John