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I just haven’t been able to get into the city earlier than that for personal reasons. Should be back to morning by next time. I know that many different types of lab work involve mathematical calculations. In the case of free testosterone, I’d like to know the difference between the two methods...

Here are my last two endocrine lab reports. A dozen years ago they did direct tests of my Free Testosterone. Now they only do a calculated equation. I did bring this up with my doctor a couple years ago, but he seemed to feel this is a perfectly fine way to measure Free T. As you can see, there...

Thanks for the helpful info, guys. Test done this afternoon. 25 pg/ml. This lab has a reference range for men of 8-43. Any thoughts?

My doctor has finally agreed to let me get the ultrasensitive estradiol test. I have been on TRT for 15 years +/-. Is there a certain time of day that would be most ideal for getting my blood drawn? I ask this because I know there are wide fluctuations in testosterone levels between morning and...