I was wondering about this as a result of there being the same amount of T showing up on my last three blood tests. It is my understanding that the T levels i'm seeing in the test results, ought to be considered ineffective due to the receptors being blocked by the Spiro. I'm currently on a medium dosage of E and Spiro (for the last six months), and started on a low dosage for three months. On low dosage, my T dropped by 20%. After doubling the dosages, T has risen slightly higher than before i started HRT, and my E levels have tripled over the last eight months, so i assumed the T would be less. I'm wondering at what point will T production be diminished? Is it a matter of increasing the dosages even more? or simply a matter of time on the current dosage? I'm a month away from my next endo appointment, so i'm a little concerned.