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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

Method Name

Electrochemiluminescence Immunoassay

Reporting Name

Luteinizing Hormone (LH), S

Specimen Type


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 do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.


Preferred: Serum gel

Acceptable: Red top

Specimen Volume: 0.6 mL

Collection Instructions: Centrifuge and aliquot serum within 2 hours of collection.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

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

Reference Values


≤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



≤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



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

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
LH Luteinizing Hormone (LH), S 10501-5


Result ID Test Result Name Result LOINC Value
LH Luteinizing Hormone (LH), S 10501-5

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Report Available

Same day/1 to 3 days

NY State Approved



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