you should get blood work done regularly especially if you are on heavy cycles year round.some physicians wont even look at you when you mension steroids especially in this country called canada.i find usa,europe etc.....physicians dont mind helping you out.every 6 months is fair to go on a pct cycle for 4-5 weeks.usually novadex and clomid should take care of this.you may half to ad some hcg.it all depends on the circomstances.yes you lose some size and strenght gains but how much you lose and maintain also depends on your routine,diet,rest,etc.......