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Test Code LHPED Luteinizing Hormone (LH), Pediatrics, Serum


Ordering Guidance


This test is only available for pediatric patients. If testing request is for a patient 18 years of age or older, order LH / Luteinizing Hormone (LH), Serum.



Specimen Required


Supplies: Sarstedt Aliquot Tube. 5 mL (T914)

Collection Container/Tube:

Preferred: Red top

Acceptable: Serum gel

Submission Container/Tube: Plastic vial

Specimen Volume: 0.25 mL

Collection Instructions:

1. Within 2 hours of collection, centrifuge the specimen.

2. For red top tubes, aliquot serum into a plastic vial immediately.

3. For serum gel tubes, serum may sit on gel refrigerated but must be aliquoted into a plastic vial within 4 hours.


Useful For

Diagnosis of precocious puberty and delayed puberty in children

Method Name

Chemiluminescent Immunoassay (CIA)

Reporting Name

LH, Pediatrics, S

Specimen Type

Serum

Specimen Minimum Volume

0.13 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 14 days
  Frozen  90 days

Reference Values

Females

<1 year: <0.02-18.3 IU/L

1-8 years: <0.02-0.3 IU/L

9-10 years: <0.02-4.8 IU/L

11-13 years: <0.02-11.7 IU/L

14-17 years: <0.02-16.7 IU/L

 

Tanner Stages*

Stage I (1-8 years): <0.02-0.3 IU/L

Stage II: <0.02-4.1 IU/L

Stage IIl: 0.6-7.2 IU/L

Stage IV-V: 0.9-13.3 IU/L

*Puberty onset (transition from Tanner stage I to Tanner stage II) occurs for girls at a median age of 10.5 (± 2) years. There is evidence that it may occur up to 1 year earlier in obese girls and in African-American girls. Progression through Tanner stages is variable. Tanner stage V (adult) should be reached by age 18.

 

Males

<1 year: <0.02-5.0 IU/L

1-8 years: <0.02-0.5 IU/L

9-10 years: <0.02-3.6 IU/L

11-13 years: 0.1-5.7 IU/L

14-17 years: 0.8-8.7 IU/L

 

Tanner Stages*

Stage I (1-8 years): <0.02-0.5 IU/L

Stage II: 0.03-3.7 IU/L

Stage IIl: 0.09-4.2 IU/L

Stage IV-V: 1.3-9.8 IU/L

*Puberty onset (transition from Tanner stage I to Tanner stage II) occurs for boys at a median age of 11.5 (± 2) years. For boys there is no proven relationship between puberty onset and body weight or ethnic origin. Progression through Tanner stages is variable. Tanner stage V (adult) should be reached by age 18.

Day(s) Performed

Monday, Wednesday, Friday

Report Available

2 to 6 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

83002

LOINC Code Information

Test ID Test Order Name Order LOINC Value
LHPED LH, Pediatrics, S 83103-2

 

Result ID Test Result Name Result LOINC Value
62999 LH, Pediatrics, S 83103-2