| Test Name: |
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LH
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| Test Code(s): |
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LH
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| CPT Code(s): |
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83002
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| Methodology: |
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Chemiluminescent Immunoassay
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| Days Performed: |
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Mon-Fri, dayshift.
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| Turnaround Time: |
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Stat: Not available stat.
Routine: Next working day.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Container: |
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Preferred: Red cap with yellow ring (SST)
Also Acceptable:
Red top
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| Collection Volume: |
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Preferred: 1 mL
Pediatrics: 0.5 mL
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| Sample Analyzed: |
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Serum
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| Volume Required: |
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Preferred: 0.5 mL
Pediatrics: 0.15 mL
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| Specimen Processing: |
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Centrifuge. If a complete barrier has not formed, transfer cell-free serum to plastic vial. Refrigerate.
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.
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| Stability: |
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Ambient: 8 hours
Refrigerated: 48 hours
Frozen: Freeze if sample will not be assayed within 48 hours.
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Interpretation
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Reference Interval:
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| Male: |
mIU/mL |
| 16 days - 10 years |
0.3 - 2.8 |
| 11 years |
0.3 - 1.8 |
| 12 years |
0.3 - 4.0 |
| 13 years |
0.3 - 6.0 |
| 14 years |
0.5 - 7.9 |
| 15 years - 16 years |
0.5 - 10.8 |
| 17 years |
0.9 - 5.9 |
| 18 years - 70 years |
1.5 - 9.3 |
| 71 years and up |
3.1 - 34.0 |
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| Female: |
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| 16 days - 10 years |
0.2 - 3.0 |
| 11 years |
0.2 - 6.5 |
| 12 years |
0.4 - 9.9 |
| 13 years |
0.3 - 5.4 |
| 14 years |
0.5 - 31.2 |
| 15 years |
0.5 - 20.7 |
| 16 years |
0.4 - 29.4 |
| 17 years |
1.6 - 12.4 |
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| Female 18 years and up: |
mIU/mL |
| Follicular phase |
1.9 - 12.5 |
| Midcycle peak |
8.7 - 76.3 |
| Luteal phase |
0.5 - 16.9 |
| Pregnant |
< 0.1 - 1.5 |
| Postmenopausal |
15.9 - 54.0 |
| Contraceptives |
0.7 - 5.6 |
Pediatric reference intervals from Reference Ranges for Serum Concentrations of Lutropin (LH), Follitropin (FSH), Estradial (E2), Prolactin, Progesterone, Sex Hormone-Binding Globulin (SHBG), Dehydroepiandrosterone Sulfate (DHEAS), Cortisol and Ferritin in Neonates, Children and Young Adults, Clin Chem Lab Med 2002; 40(11):1151-1160.
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| Test Limitations: |
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Results may be affected if patient has developed heterophilic antibodies due to exposure to animal based protein products.
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| Additional Information: |
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A high dose hook effect is not seen up to 18,000 mIU/mL.
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