Can High Estrogen hinder Gains ?

[sweezy]

Nope. I've done a shit-ton of research, and I've seen graphs displaying decreasing levels SHBG, and cortisol with 20 week cycles. I've also been told by a number of chemists (like Pat Arnold and Matt Cahill) that strong androgens upregulate the AR. Do some research of your own and look into myostatin. Until then, you're just parroting decades old bro-science.
Oh, and please don't assume that I'm a newb because I just joined this site recently, I can be found on plenty of others.

Bonaparte does this mean the AAS starts to lose effect @ 20 weeks ?

[Bonaparte]

Bonaparte does this mean the AAS starts to lose effect @ 20 weeks ?

uhhh...yeah. Did you think that you could keep gaining at a good rate indefinitely? AAS won't really lose their effect, it is just that you will plateau and new gains will be difficult to come by until you come off or lower the dose (as per blast and cruise) for several months, giving your body a chance to lower myostatin back to normal levels.