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HelpTest Code LH Luteinizing Hormone
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | Send the sample to the laboratory immediately |
| Refrigerate: | 7 days |
| Frozen: | 6 months |
Reference Interval
| Age | Female |
|---|---|
| 4 days - 2 mths | ≤2.4 IU/L |
| 3 mths - <1 yr | ≤1.2 IU/L |
| 1 - 9 yrs | ≤0.3 IU/L |
| 10 - 12 yrs | ≤4.3 IU/L |
| 13 - 14 yrs | 0.4-6.5 IU/L |
| 15 - 16 yrs | ≤13.1 IU/L |
| 17 - 18 yrs | ≤8.4 IU/L |
| Age | Male |
|---|---|
| 4 days - 2 mths | 0.2-3.8 IU/L |
| 3 mths - <1 yr | ≤2.9 IU/L |
| 1 - 9 yrs | ≤0.3 IU/L |
| 10 - 12 yrs | ≤4.3 IU/L |
| 13 -14 yrs | ≤4.1 IU/L |
| 15 - 16 yrs | 0.8-4.8 IU/L |
| 17 - 18 yrs | 0.9-7.1 IU/L |
| ≥19 yrs | 0.6- 12.1 IU/L |
Female
Tanner Stage I: Not available
Tanner Stage II: ≤ 2.3 IU/L
Tanner Stage III: ≤ 7.4 IU/L
Tanner Stage IV: 0.3 - 6.7 IU/L
Tanner Stage V: 0.4 - 21.2 IU/L
Normally Menstruating Females
Follicular Phase: 1.8 - 11.8 IU/L
Mid-Cycle Peak: 7.6 - 89.1 IU/L
Luteal Phase: 0.6 - 14.0 IU/L
Postmenopausal Females Without HRT: 5.2 - 62.0 IU/L
HRT: Hormone Replacement Therapy
Male
Tanner Stage I: ≤ 1.2 IU/L
Tanner Stage II: ≤ 1.2 IU/L
Tanner Stage III: ≤ 2.3 IU/L
Tanner Stage IV: ≤ 4.9 IU/L
Tanner Stage V: 0.6 - 5.9 IU/L
Days and Times Performed
24 hours, TAT 1 day
Methodology
Chemiluminescent Immunoassay
Service Code
31661
Update
Last updated 16/05/2024
Updated on Methodology.
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Assessment of hypothalamic-pituitary-gonadal axis in the diagnosis of amenorrhoea, androgen deficiency and gonadal dysfunction.