19 days
High-pressure liquid chromatography (HPLC)/tandem mass spectrometry
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Measures a metabolite of DHT, reflecting peripheral androgen activity. Useful in evaluating hirsutism or androgen excess.
Serum or Plasma
1 mL
Red-top tube or gel-barrier tube or lavender-top (EDTA) 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 |
|---|---|
| Room temperature | 6 days |
| Refrigerated | 6 days |
| Frozen | 1095 days |