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Test ID LH Luteinizing Hormone (LH), Serum

Useful For

An adjunct in the evaluation of menstrual irregularities

 

Evaluating patients with suspected hypogonadism

 

Predicting ovulation

 

Evaluating infertility

 

Diagnosing pituitary disorders

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum


Ordering Guidance


1. The limit of quantitation for this test is 0.01 IU/L. In pediatric settings where greater analytical sensitivity is required, order LHPED / Luteinizing Hormone (LH), Pediatrics, Serum.

2. The preferred test to confirm menopausal status is FSH / Follicle-Stimulating Hormone (FSH), Serum.



Specimen Required


Patient Preparation: For 12 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.6 mL

Collection Instructions: Within 2 hours of collection, centrifuge and aliquot serum into a plastic vial.


Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 7 days
  Frozen  180 days
  Ambient  24 hours

Reference Values

Males

≤4 weeks: Not established

>1 month-≤12 months: ≤0.4 IU/L

>12 months-≤6 years: ≤1.3 IU/L

>6-≤11 years: ≤1.4 IU/L

>11-≤14 years: 0.1-7.8 IU/L

>14-≤18 years: 1.3-9.8 IU/L

>18 years: 1.3-9.6 IU/L

 

Females

≤4 weeks: Not established

>1-≤12 months: ≤0.4 IU/L

>12 months-≤6 years: ≤0.5 IU/L

>6-≤11 years: ≤3.1 IU/L

>11-≤14 years: ≤11.9 IU/L

>14-≤18 years: 0.5-41.7 IU/L

 

Premenopausal:

Follicular: 1.9-14.6 IU/L

Midcycle: 12.2-118.0 IU/L

Luteal: 0.7-12.9 IU/L

Postmenopausal: 5.3-65.4 IU/L

Day(s) Performed

Monday through Sunday

CPT Code Information

83002

Report Available

Same day/1 to 3 days

Reject Due To

Gross hemolysis Reject
Gross lipemia OK

Forms

If not ordering electronically, complete, print, and send an Oncology Test Request (T729) with the specimen.

Secondary ID

602752