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HelpTest Code LAB87 Luteinizing Hormone (LH), Plasma or Serum
Additional Codes
46100
Reporting Title
LH
Methodology
Roche Diagnostics, Electrochemiluminescence Immunoassay
Useful to define hypothalamic-pituitary-gonadal axis. LH is produced by B cells of anterior pituitary under control of hypothalamic gonadotropin-releasing hormone.
Performing Laboratory
OhioHealth Laboratory Services - RMH and MH Core Laboratories
Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Serum
Draw blood in a gold-top serum gel tube(s). (Hemolyzed specimen is not acceptable.) Spin down and send 1 mL of serum refrigerated.
Note:
1. A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.
2. Heterophile antibodies may interfere with this assay.
3. Indicate serum and draw time on request form.
4. Label specimen appropriately (serum).
Alternate:
Plasma
Draw blood in a mint green-top (heparin) gel tube(s). (Hemolyzed specimen is not acceptable.) Spin down and send 1 mL of heparinized plasma refrigerated.
Note: 1. Heterophile antibodies may interfere with this assay.
2. Indicate plasma and draw time on request form.
3. Label specimen appropriately (plasma).
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum or plasma | Refrigerated | 14 days |
| Ambient | 5 days | |
| Frozen | 12 months |
Specimen Transport Temperature
Refrigerate/Frozen OK/Ambient OK
Reference Values
RMH
Males: 2-12 mIU/mL
Females:
Follicular phase: 2-15 mIU/mL
Midcycle peak: 22-105 mIU/mL
Luteal phase: 0.6-19 mIU/mL
Postmenopausal: 16-64 mIU/mL
LH secretion occurs in pulses with rapid fluctuations over entire reference range. Very high levels of human chorionic gonadotropin as from pregnancy, trophoblastic disease, or testicular cancer may crossreact and falsely elevate LH levels.
Day(s) Test Set Up
Monday through Sunday; Continuously
Test Classification and CPT Coding
83002