There is no exact science between all humans..
One option is to run it during and maybe up until all half lives have left your body and then move to a SERM or AI..
Or you can run it through PCT like the PCT article explains..
The end of the day is you need to do whatever it might be for long enough that your sperm levels have returned to normal (should be much higher actually during a PCT) and that your testosterone levels have returned to also a slightly higher rate than before and that will then slowly dip to hopefully baseline once discontinued (all age dependent).
"Whether You Think You Can or Can't, You're Right"--Henry Ford