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Chemiluminescent Immunoassay (CLIA)
A reliable indicator of LH secretion and Leydig cell function. Evaluation of gonadal and adrenal function. Helpful in the diagnosis of hypogonadism in males and hirsutism and virilization in females.
Male 1-10 yrs: 0.00-0.20 ng/mL; Male 10-14 yrs: 0.10-5.00 ng/mL; Male 14-18 yrs: 1.00-9.50 ng/mL; Adult Male: 2.50 - 9.50 ng/mL; Female 1-10 yrs: 0.00-0.20 ng/mL; Female 10-14 yrs: 0.10-0.50 ng/mL; Adult Female: 0.10 to 0.90 ng/mL. Note that there can be significant diurnal variation in testosterone levels in both males and females. Reference ranges are based on morning samples. Caution should be taken in interpreting values drawn at other times of the day.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect blood in an SST (preferred) or red top tube.
Collect specimen in an SST (preferred) or red top tube. Centrifuge, aliquot serum into a plastic vial and refrigerate up to 48 hours or freeze for longer storage.