Luteinizing Hormone, Serum
Also known as: LH
Use
The Luteinizing Hormone (LH) test is used primarily to evaluate the function of the gonads (ovaries in females and testes in males). It helps in the diagnosis of conditions related to reproductive health such as amenorrhea, infertility, and disorders of sexual differentiation. The hormone plays a critical role in regulating the menstrual cycle and ovulation in women, and it stimulates testosterone production in men. Abnormal LH levels can signal a variety of reproductive issues including pituitary disorders, polycystic ovary syndrome (PCOS), menopause, and hypogonadism.
Special Instructions
Collect specimen in a serum separator tube, plasma separator tube, Green (lithium heparin), or Lavender (K2 EDTA, or K3 EDTA). Allow specimen to clot completely at room temperature and separate serum or plasma from cells as soon as possible, or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. Minimum volume is 0.5 mL. Refrigerated storage is required for transport.
Limitations
The test may be impacted by factors such as sample hemolysis, which is considered an unacceptable condition for analysis. Additionally, interpretation of LH levels should be done cautiously during the use of certain medications or in the presence of conditions affecting hormone production, such as pregnancy or certain endocrine disorders.
New York Approved
Methodology
Immunoassay (ECLIA)
Biomarkers
LOINC Codes
- 10501-5
- 10501-5
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Allow specimen to clot completely at room temperature. Separate serum from cells ASAP or within 2 hours of collection.
Storage Instructions
Refrigerated.
Causes for Rejection
Hemolyzed specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 5 days |
| Refrigerated | 2 weeks |
| Frozen | 6 months |