imo its contientious since there are differing views on how long it takes for normalcy to be achived and more importantly, consolidated, in terms of testicular function.
cut a long story short the enemy is irreversible atrophy and changes in testicular mass. so long as you time it to avoid those, then youre ok
just spend the 25 bucks (if you have insurance) and get your blood tested general rule though is time on is the same time you need a break before your next one