The most obvious benefit that injectable steroids have over their oral cousins is that they are not hepatotoxic. Injectable steroids are safer on the liver and the user does not risk hepatic injury because injectable compounds don’t require specific chemical alterations which allow them to survive passing through the liver without being broken almost entirely down. It’s also worth consider that injectable steroids have a much longer half-life due to the ester attached to the hormone. To get the maximum benefit from oral steroids, most must be administered daily, or sometimes they are spread out throughout the day. The ester present in injectable steroids allows a much more infrequent administration and don’t need to be administered daily. More information about Esters
Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.
you need to come off everything and begin hcg and arimadex. I would use arimadex at 1/2mg 3 x wk and hcg at 250iu twice wk every wk and attempt to restore any natural test I could. The adex and hcg should help elevate sperm count and natural test over time. I would also use clomid at 100mg/ day for a couple wks and then drop to 50mg day for 2 more wks after you quit everything. Its going to take awhile, possibly a year before you are fertile again. Even on trt there is still a 50% chance of being fertile, but the choice to come off totally or stay on trt depends on how long you have been on trt up until now. If its been a year then Id attempt to drop everything, if its been longer then Id revert to a minimum trt dose of 80-100mg wk and continue on hcg arimadex regimen. U really need a fertility specialist though but for now this is what Id do personally