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Test Code Billings Clinic: 8863 Luteinizing Hormone (LH), Plasma or Serum

Performing Laboratory

Billings Clinic Laboratory:  Chemistry

Useful For

Determination of the concentration of LH is essential for the prediction of ovulation, in the evaluation of infertility, and the diagnosis of pituitary and gonadal disorders.

Methodology

Chemiluminescence

Specimen Requirements

Submit only 1 of the following specimens:

Serum or plasma should be physically separated from cells as soon as possible with a maximum limit of two hours from the time of collection.

 

Plasma

  • Draw blood in a green-top (lithium heparin) tube(s).
  • Spin down and send 1.0 mL of heparinized plasma frozen.

 

Serum

  • Draw blood in a plain, red-top tube(s) or a serum gel tube(s).
  • Spin down and send 1.0 mL of serum frozen

Storage/Stability

Specimen Type Temperature Time
Plasma, Serum Refrigerated 2 days
  Frozen (preferred) 1 month
  Ambient 8 hours

 

Reject Due To

  • Samples frozen/thawed more than once

Reference Values

Males:

20 - 70 years:        1.5 - 9.3 mIU/mL

>70 years:             3.1 - 34.6 mIU/mL

 

Females:
Normally Menstruating
Follicular Phase:               1.9 - 12.5 mIU/mL
Midcycle:                           8.7 - 76.3 mIU/mL
Luteal Phase:                    0.5 - 16.9 mIU/mL

Pregnant:                          <0.1 - 1.5

Post Menopausal:            5.0 - 55.2 mIU/mL

Children:                           <0.1 - 6.0 mIU/mL

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

83002 - Gonadotropin; luteinizing hormone (LH)

 

If both LH and follicle-stimulating hormone are desired, order Billings Clinic: #8167 “Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH), Plasma.”

LOINC Code Information

Reporting Name LOINC Code
LH 10501-5