I highly recommend this article:
http://www.tahomaclinicblog.com/hcg-neuronal-regeneration/
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HCG boosts libido & erectile function
Have you ever read that HCG has been reported to increase erectile function and sexual desire for some men? No, it wasn’t 100% effective, but you’d think that research finding would have been all over the news, especially since the article was published in a major medical journal, Urology. Since the research was published all the way back 1987, the word should have gotten around by now. But since HCG isn’t patentable it, of course, will never get the attention that conventional drugs do—but I digress.
Researchers actually reported two randomized studies in the one journal. In the first study, termed preliminary, twenty-nine men with ED (in pre-Viagra 1987, it was called impotence) took either HCG injections (5000 IU twice weekly), or injections of testosterone propionate (which is still in widespread use in 2013), 50 milligrams twice weekly. The HCG outperformed the testosterone, with 49% responding versus 28% in the testosterone group.
The second study involved forty-five men, again randomized, this time HCG versus placebo. Both took twice-weekly injections, placebo or 5000 IU HCG. HCG administration was associated with significant improvement in ED in ten of twenty-one men (47%). The placebo was successful in only three of twenty-four men (12.5%).
The researchers also noted a significant increase in testosterone levels in all twenty-one men who took the HCG injections, but no increases in the men who took the placebo injections. (There was no measurement reported of estrogen in either group.) Since the entire HCG group had a significant increase in testosterone, but only 47% had a significant improvement in ED, it’s reasonable to assume that HCG improves ED in some men in a non-testosterone-related way."