Testosterone, bioavailable and free

Alphabetical Test listing

Testosterone, bioavailable and free-13650

Testosterone, bioavailable and free
  • Detects an abnormal testosterone level in males and females;
    • in males, to help diagnose the cause of erectile dysfunction or the inability of your partner to get pregnant (infertility);
    • in females, to help diagnose the cause of masculine physical features (virilization), infertility, or polycystic ovary syndrome (PCOS);
    • in children, to help determine the cause of genitals that are not clearly male or female (ambiguous genitalia) or delayed or early puberty
2.0 mL
1.0 mL
Note: This volume does not allow for repeat testing.
  1. Spin within 45 minutes of sample collection
  2. Transfer serum to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp) 
  3. Freeze


To avoid delays in turnaround time when requesting multiple tests on frozen samples, submit a separate frozen aliquot for each test requested.


Frozen (preferred)

Ambient - 2 days

Refrigerated - 7 days

Esoterix Endocrinology (501905) via LabCorp (502338): R-LC
Mo - Fr
3 - 5 days

Bioavailable testosterone: Ammonium sulfate precipitation

Total testosterone: High Performance Liquid Chromatography with Tandem Mass Spectrometry (HPLC-MS/MS)


An interpretive report will be provided

Result 2986-8