14 days
High-pressure liquid chromatography (HPLC) tandem mass spectrometry.
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Precursor to steroid hormones. Assessed in adrenal and gonadal disorders.
Serum (preferred) or Plasma
2.5 mL
Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.
| Temperature | Period |
|---|---|
| Frozen | 730 days |
| Freeze/thaw cycles | Stable x3 |