I thought this would be interesting for whoever is interested in maintaining fertility while on a TRT regimen.
Read the following:http://jcem.endojournals.org/content/90/5/2595.full
If you can sift through the scientific jargon behind this, I suppose the Cliffs Notes version is that a study was done on those who were given 200mg wkly of T along with either 125 or 250 or 500IU of HCG EOD were measured for ITT (intratesticular testosterone). At the 250 and 500 HCG levels, ITT was maintained (and exceeded)while on 200mg T. Spermatogenisis/sperm production was presumably intact. There are a few caveats at the end. The subjects had normal T/LH/FSH to start with and then were suppressed by the exogenous T (thus, they weren't hypogonadal). However, I have seen another study showing hypogonadal men who combined HCG w/T and were able to achieve pregnancies with their spouses/partners. I can theorize that since a lot of T dosages are 100mg/week (less than the study), the HP axis would be less surpressed and possibly the fertility result might be better? I also imagine one's fertility starting point would need to be measured via a semen analysis so that there's a baseline starting point.