I really can't understand why anyone would not use HCG on any cycle. Sure the need is a lot greater on a 16wk Tren/Deca cycle than a 10 wk Test E cycle but since the stuff is dirt cheap and always beneficial its always a great idea to run it. One thing it will do is to help speed recovery which in turn will help maintain gains so if maintaining gains is a concern then you should always use it on every cycle.