Ever want a "factual" study showing how long the body takes to even begin Producing Testosterone after discontinuing a cycle, or HRT?
Here you go...
A 21-day T sampling period was appropriate to determine the t1/2 of exogenous T because gonadotropin-releasing-hormone stimulation tests indicated that the hypothalamic–pituitary–testicular axes of the subjects did not regain sufficient sensitivity to stimulate release of T until 4–6 weeks after discontinuation of the TC injections.
clinchem.aaccjnls.org
Here you go...
A 21-day T sampling period was appropriate to determine the t1/2 of exogenous T because gonadotropin-releasing-hormone stimulation tests indicated that the hypothalamic–pituitary–testicular axes of the subjects did not regain sufficient sensitivity to stimulate release of T until 4–6 weeks after discontinuation of the TC injections.

Detection of anabolic steroid administration: ratio of urinary testosterone to epitestosterone vs the ratio of urinary testosterone to luteinizing hormone
Abstract. Our goal in this study was to determine whether the urinary ratio of testosterone to luteinizing hormone (T/LH) as an indicator of exogenous anabolic
