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Test Code LH Luteinizing Hormone

Laboratory Code

LAB87

Specimen Requirements

Specimen Type: Serum
Container/Tube: Gold Top (SSTII) 
Volume: 5.0 mL 
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.

Specimen Stability

Specimen Type Serum
Ambient 24 hours
Refrigerate 7 days
Frozen 6 months

Methodology

Chemiluminescent Immunoassay

Days and Times Performed

24 hrs, TAT 1 day

Specimen Condition

Gross Haemolysis Alert/Reject
Icterus OK
Lipaemia OK
Others Not applicable

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

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.

Service Code

31661

LOINC Code Information

83103-2

Alias

Interstitial Cell Stimulating Hormone
Leuteotropic Hormone
Pituitary gonadotropins

Update

Last updated 11/03/2025