HPTA recovery depends on many factors one of them being the state of the HPTA before starting a cycle (like a previous cycle) it's noted that it could take up to 6-12 months for your HPTA recover and your endogenous test levels to normalize. So if you jump into a cycle before your HPTA has fully recovered it could further negatively impact it meaning recovery would be slightly more challenging so, I'd reckon giving 6-8 months after pct has been completed between cycles would be a good protocol to follow.