Gonna keep it simple, estrogen build up in pects jokingly referred to as breast buds. Ive done 3 very successful sd cycles w/ PCTs maintaining a majority of the gains; nolvedex being the anti-estrogen during that 5 week process. Question is, why, a few weeks after PCT, do they come back. Essentially, if im not taking nolvedex, i have them. Was very aware of side effects going into this about a year ago and after thorough study i planned the cycles. All three were the exact same but only after the most recent PCT did they return, as if i was on cycle again.
(Latest PCT ended about 10/30 ish)