here is the facts on hcg that i have learned over the years using it, looking at bloods, and anectodal stuff from people.
it is derived from pregnant female urine, yes you heard that right. of course you aren't injecting the actual urine, its a polypeptide made in a lab that is the same thing, no differnet then when you inject testosterone.. you aren't actually injecting real testosterone, its a hormone made in a lab too.
hcg suppresses your pitutiary glands. why? cause it mimics the hormones it spits out. if you are on AAS you are going to be shutdown with or without hcg, it will not offset that fact. if it did then nobody would need trt for life now would they?
now what does hcg do? by mimicking those hormones it will feed your testes making them larger. but don't fall for the bro science that this is 'preventing shutdown' because it isn't. this is the big 'rich piana fapbro science' that guys of his era thought who listened to him and it got them completely screwed. just cause your bro-nuts plump up, doesn't mean your pituitary glands still aren't off. also run bloods even off cycle and you will see when you use hcg actually SUPPRESSES your own bodies lh and fsh! that is what hormones do, just like when you use exogenous testosterone your OWN testosterone goes down and gets replaced. hcg is doing the same thing with your lh and fsh
now as far as fertility HCG has NOT ever been proven in legitimate studies to be a fertility aid in men. the ONLy study ever published that i have seen (and please correct me if i am wrong anyone) was a study that showed that CLOMID + VIT E caused a rise in fertility. now of course this wasn't done on juice heads but it shows that its possible for men to get treated for fertility. however if someone invented a true fertility option for men they would have patented it and made billions a long time ago considering sperm counts have been dropping like rocks for decades.
i have seen guys who have blasted the hell out of hcg and not have any shred of luck with fertility, and i have seen guys who have had luck. i am on the fence if it actually helps and would even argue that it can/will hurt your fertility in the long game since it is suppressing your HPTA/pit glands.
my view is simple. if you have exhausted everything and are desperate then i would blast the hell out of hcg, clomid, vitamin E, herbals, etc and try it. WHILE ALSO coming off ALL ANABOLICS (yes even trt) maybe you will get lucky. but if you think that taking hcg while on trt or gear is going to magically boost your fertility then that is wishful thinking. the older you get the harder it will be too. and people who have got lucky you can make the argument it would have happened with or without hcg as it takes 1 sperm.
also there are a LOT Of clinics, sources, etc. who push the hell out of hcg. they even for years pushed the 'hcg diet' which is comically a horrible long term solution to weight loss. these guys are working on comissions to sell you hcg so of course they will push it. hcg is also very safe to use, cheap to produce and they make gigantic margins on it. so of course its the perfect compound for them to convince you to buy. so keep that in mind...
and it helps tremendously the social media bro-guru to tell you to use hcg in pct, and for you to watch your balls plump up like magic, this will make you happy and give you that make believe notion that it is working. when reality behind the scenes it is actually causing more harm then good since it is only keeping you more supressed