By Jenetic (When to begin PCT:
On average, begin PCT approximately 5-10 days after your last injection regardless of longer acting esters. Begin PCT 1-3 days after your last injection and/or intake when using short acting esters.
Keep in mind, pituitary LH secretion automatically increases as the hormones diminish from your system. The elevated androgen levels are from an exogenous source and your endogenous production is suppressed. Therefore, waiting for the exogenous androgens to completely clear from your system, ultimately results in lower total concentrations of androgens in your system when beginning PCT. This leads to an unfavorable andgrogen:estrogen ratio and the well known “crash” effect.
*As previously mentioned, the actions of HCG take place independently and is not affected by exogenous hormones and/or preexisting HPTA suppression. There are no contradictions with respect to the effectiveness of HCG usage while exogenous hormones are present in your system.)