There is no question HCG with steroids vs. HCG without will keep the balls plump and we can debate this all day but much of that is just aesthetic. If you are concerned with fertility, HCG may help but HMG is the go to. I'm not saying you won't recover quicker but go on a decent cycle and take HCG and I suspect you will still have zero or next to no sperm until you stop. Many use Clomid and HCG while on TRT to maintain fertility - no personal experience doing it but it is easy to find info on the net about it. That being said you can find anything you want on the net.Do you know if theres any info or research on this actually working?
If fertility is a concern and you want the best chance of impregnating your woman, get off all testosterone and if you were on it PCT and get a sperm test.
That is my opinion which doesn't make it right but it is also the opinion of many who were on decent cycles and a lot of HCG - 500 EOD, and sperm tests and their sperm had bad motility and their count was low. When they went off, it came back up.