Direct measurement of free testosterone provides accurate assessment of biologically active hormone, particularly in patients where calculated free testosterone (based on total testosterone and SHBG) may be inaccurate. The combination of direct free and total testosterone offers comprehensive evaluation.
This test is used to evaluate suspected low testosterone in men with symptoms like low libido, fatigue, and erectile dysfunction; investigate hyperandrogenism in women; and monitor testosterone replacement therapy. Sample type is serum.
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