Quote Originally Posted by BigJames
I see this mentioned in threads and I see that Nolva and maybe letro should be used during cycles and proper pct is important, but what exactly it "estrogen rebound". I did a search and cannot find anything that clarifies exactly what it is and what causes it?

Anyone know more about it?
Some guys stay on estrogen suppression until the last day of the last injection then they stop all estrogen suppression drugs. Well you might have the highest testosterone levels of your cycle at that time and your anti-estrogen wears off allowing massive amounts of testosterone to convert to massive amounts of estrogen. So you might want to continue your anti-estrogens for 1 full week after last injection then it should be safe to discontinue the anti-estrogens.