In order to prevent testicular atrophy and speed recovery, hcg should be dosed @ 2x 250iu per week throughout the duration of the cycle up to pct.

You are mimicking LH function with hcg, keeping you testes active so they don't shink during cycle and so that they are already primed for pct.

Two weeks is adviseable between last injection and start of pct. Even trace amounts of exogenous hormones in your system can keep you shut down and basically nullify pct.