A Luteinizing Hormone (LH) test measures this pituitary hormone that plays crucial roles in the reproductive system. In women, LH triggers ovulation. In men, it stimulates testosterone production.
What This Test Measures
Luteinizing Hormone (LH):
A hormone produced by the pituitary gland that signals the gonads (ovaries or testes) to produce sex hormones and support reproduction.
Reference Ranges
Women:
• Follicular phase: 1.9-12.5 IU/L
• Mid-cycle (ovulation peak): 8.7-76.3 IU/L
• Luteal phase: 0.5-16.9 IU/L
• Postmenopausal: 10-54.7 IU/L
Men: 1.5-9.3 IU/L
Who Should Consider This Test
Women:
• Fertility evaluation
• Irregular or absent menstrual periods
• Predicting ovulation (LH surge)
• Evaluating menopause
• PCOS assessment
• Evaluating pituitary function
Men:
• Low testosterone evaluation
• Fertility problems
• Distinguishing between testicular and pituitary causes of low testosterone
Interpreting Results
High LH in Women:
• Menopause or ovarian failure
• PCOS (often elevated LH:FSH ratio)
• Ovulation (mid-cycle surge)
Low LH in Women:
• Pituitary dysfunction
• Hypothalamic amenorrhea
• Eating disorders, excessive exercise
High LH in Men:
• Primary testicular failure (Klinefelter syndrome, injury)
Low LH in Men:
• Pituitary dysfunction
• Secondary hypogonadism
How It Works
1. Order your test online – no doctor visit required
2. Visit any Quest Diagnostics location nationwide
3. Simple blood draw takes approximately 5 minutes
4. Results delivered to your secure portal within 1-2 business days
Preparation
No fasting required. Women may be advised to test on specific cycle days depending on clinical question.
Related Tests to Consider
• FSH – Usually tested alongside LH
• FSH & LH Panel – Combined test
• Estradiol – For women
• Testosterone – For men
Why Choose Wittmer Rejuvenation Clinic
At $15, our LH test is affordably priced. We partner with Quest Diagnostics for reliable, CLIA-certified laboratory testing.
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