Gaps in my HCG Usage

Hey guys. I’ve been on TRT for about a year and a half, 100 mg Test C divided 2x per week ito 50mg doses. I have blasted a couple cycles since. During this time, I have also injected HCG at 250IU on Monday, Wednesday and Friday to attempt to remain able to have fertility until such time as the wife and I are ready to have kids.
There have been several gaps where I had to go a week or two without the HCG because of waiting for shipments, pharmacy didn’t stock it, etc. I have read that continued HCG can desensitize receptors, so it is good to come off once in a while anyhow.

Questions:

  1. Rather than running HCG year round with no breaks, is it better to cycle on and off at times? (Remember the reason for it is to preserve fertility)
  2. If I had to stop using HCG for 2 weeks here and there a few times over the last year, how much do you think this will affect my ability to maintain fertility?
  3. If say I had to go three weeks before a resupply of HCG, should I blast the HCG the first week back on it, and what dosage would be recommended?

Thanks for your thoughts guys…it is highly appreciated.