There are many points of contention about its use and im not going to argue them but here is my stance. HCG mimics our own LH and therefor while its in our system it will suppress natural levels. Post cycle we have a few things to overcome, one is the production of LH/FSH and even if we have ample amounts of that often times our testis have atrophied and it takes time and coaxing from LH/FSH to get the working. If your doing a short 6 week cycle HCG in mid cycle likely wont do a lot, but likely wont hurt either. If your running 10-12 weeks I think running 1000IU HCG EOD for 10-14 days will help to revers atrphy. Then at the end of cycle run it again (10-14 days) prior to starting post cycle clomid/nolva. If your running short esters the 10-14 days on HCG will have to occure during a cycle. If your running long esters then thie 10-14 days will be after last injection but before post cycle clomid/nolva. The key is to have last HCG injection approx 3 days before starting post cycle clomid/nolva since it will hinder the LH release your trying to trigger.