when and when not to use HCG?

Hi I was wondering what kind of cycles that we need to use with it HCG and what kind of cycles that we Dont need to use with it HCG?

THANKS in advance

Long cycles that are 20+ weeks long....... Or cycles that will shut you down hard..... Like cycles with fina and deca for example.

I wouldn't use HCG on the basic test cycle for 10 weeks or so..... or anyother cycle that has mild compounds used.

Too much use of HCG will desensitize the testes