Protecting fertility on cycle

I’ve been looking into protecting my fertility while on cycle, I know there’s no 100% method but wondering what advice was out there for preserving fertility as much as possible while on cycle ?
Will be running HCG while on my next cycle as I’ve found this interesting read that states

A retrospective study published by Hsieh et al [73] in 2013 found that out of 26 men treated with TRT and intramuscular 500 IU HCG every other day, no patient became azoospermic.


Along with the HCG does anyone have any fertility protection tips at all ?

Thanks I’m advance guys
 
Freeze some sperm. 100% chance you’ll have good a perm post cycle assuming you have current good swimmers.
 
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