Luteinizing Hormone (LH), Eight Specimens
Use
The luteinizing hormone (LH) test measures the amount of LH in the blood. It is used to evaluate pituitary gland function, help diagnose reproductive disorders, assess gonadal function, and monitor puberty onset for pediatric patients. LH levels are significant in diagnosing conditions such as infertility, pituitary disorders, and menopause. Evaluating LH alongside other hormone levels provides valuable insights into the body's reproductive hormone balance.
Special Instructions
Please refer to the directions for Sequential Sampling. This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Limitations
Interference can occur in samples from individuals consuming high doses of biotin. Also, test results must be interpreted with caution in patients with hormone-producing tumors, abnormal associative conditions affecting hormone levels, or those undergoing hormone replacement therapy. Reference intervals may not be applicable to all patients, especially those with age-related endogenous changes or on medications influencing hormone levels.
Methodology
Immunoassay (ECLIA)
Biomarkers
LOINC Codes
- 32328-7
- 33827-7
- 27848-1
- 27851-5
- 27853-1
- 27854-9
- 27855-6
- 27858-0
Result Turnaround Time
1-2 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
Red-top tube, or gel-barrier tube
Collection Instructions
Draw blood in a red-top tube or a gel-barrier tube. Spin down and send 1 mL of serum frozen in a plastic vial.
Patient Preparation
Patients should stop biotin consumption at least 72 hours prior to the collection.
Storage Instructions
Send frozen; serum must remain frozen until tested.
Causes for Rejection
Gross hemolysis; gross lipemia; improper labeling; thawed specimen.
Stability Requirements
| Temperature | Period |
|---|---|
| Frozen | 14 days |