Good question. I have not seen any data.
It may increase 17-OH-progesterone, which has been linked to increased intratesticular testosterone and sperm. But I am not sure if there is a threshold.
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Best hCG Dose with TRT: 17-Hydroxyprogesterone Lab Test
The use of testosterone replacement therapy (TRT) increases blood levels of testosterone but, surprisingly, it decreases the level of testosterone inside the testicles (Intratesticular testosterone or ITT). ITT is key for proper sperm production. This ITT decrease is due to the LH and FSH shut...www.excelmale.com