Tweetin my opinon i would not go longer than 10 weeks for a first cycle. as far as dose depending on your stats under 200lbs i would say that 500mg of test/wk would be good over 200lbs go with atleast 750mg of test/wk. i ran 750mg test/wk on my second cycle for 14 weeks did pretty good on it. just make sure that you have all your PCTs on hand. good luck man.