Testosterone test

What is the specific name for the test that everyone gets for testosterone levels? You know, the one that people have stated when they talk about their 200ng/dl to 600ng/dl stories. I was going to go to a lab and get myself tested, I have a few suspicions (fatigue, lack of interest in things, etc) and just want to rule a few things out. I suspected for some time it could be low T, but I never thought about getting a test done. The thing is, there are a number of different testosterone tests. I was told to get a "serum" test by a friend, but that was all. Here is, for example, a list of tests one lab in my area offers for testosterone: Testosterone, Free (Direct) With Total Testosterone, LC/MS-MS Testosterone, Free (Direct), Serum Testosterone, Free (Direct), Serum With Total Testosterone Testosterone, Free and Weakly Bound Testosterone, Free and Weakly Bound, With Total Testosterone, LC/MS-MS Testosterone, Free, Equilibrium Ultrafiltration With Total Testosterone, LC/MS-MS Testosterone, Free, Mass Spectrometry/Equilibrium Dialysis Testosterone, Free, Serum (Equilibrium Ultrafiltration) With Total Testosterone Testosterone, Total, Serum Which would I get? I am thinking the last one on the list, but I wanted to check first. Thanks!

Put the internet to work for you. via Personal Recipe 2629979