Luteinizing Hormone

Alternative Names/Synonyms	LH
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Blood
Test Code	LHS2, LHP2

Clinical Significance

Assisting in the diagnosis of dysfunctions within the hypothalamus-pituitary-gonads system, predicting ovulation, and evaluating infertility, hypogonadism and/or menstrual irregularities.

Specimen Requirements (Sample Type)

Serum, Plasma

Specimen Requirements (Volume (mL))

0.5 mL

Specimen Requirements (Tube Type)

Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types

Collection Requirements

Blood Collection Instructions

Sample Stability

Room Temperature: N/A

Fridge: 14 days @ 2-8°C

Freezer: 6 months @ -20°C

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Roche cobas e 602, immunoassay

Test Availability

24 hours a day, 7 days a week

STAT Turnaround Time

1 hour

Routine Turnaround Time

3 hours

Reference Ranges

Females:
Follicular phase: 1 - 12 IU/L
Mid-cycle: 17 – 77 IU/L
Luteal: 1 – 15 IU/L
Postmenopausal: 11 – 40 IU/L
Oral contraceptives: 1 - 8 IU/L

Males: 1 - 8 IU/L

In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 extension 4688