lenght of time will depend on lot of variables such as type compounds ran, gyno history,lenght of cycles,genetics, other sups or medications currently taken, how fast the gyno subsides ect...
I would do it in a ramp up ramp down fashion protocol,monitoring gyno and lethro dosing.
Meaning
1 slowly ramp up to access ur tolerance and let ur body adjust.
2 if it starts shrinking while ramping up, stay at that dose for a period till it is gone then ramp down
3 use an AI bridged on the backend, but start the AI at reg. dosage and ramp it down also.
This thread now needs to be moved to PCT alot of help over there. Hit me up i would like to follow along
Good luck bro