"Always Cycle Steroids. A steroid cycle usually consists of 6 to 12 weeks of drug use followed by an equal period of time or more abstaining from all anabolic/androgenic steroids. This practice is advised for a number of reasons. For one, as you supplement male steroid hormones your body will reduce the production of its own testosterone. Cycling helps reduce the risk of
developing long-term fertility and hormonal issues, which are sometimes caused by the uninterrupted use of steroids for many months or years. Cycling also lets your general markers of health (such as cholesterol levels, hematocrit, and blood pressure) return to their normal state periodically, reducing the impact temporary changes may have over time. Those individuals who use anabolic/androgenic steroids for long periods of time without interruption run a greater risk that these negative changes in health markers will result in long-term health issu
Again from 10th edition of anabolics