Trickie, how long of a cycle are we talking? 4-6 weeks? 8-10weeks? 12+?
On longer cycles you can use Hcg @ 500iu for 3-6 days in the middle of the cycle, and then again on week after the cycle for 6-9 days @ 500 iu.
With a shorter cycle I usually only use Hcg at the end. I prefer the Hcg treatment to start the week after the last injection.
Hcg has many sides and cause more damage than good if used improperly or if the doses are too high.