- 3874 San Jose Park Drive Suite 5, Jacksonville, FL 32217 | Phone: 904-799-2531
Luteinizing Hormone (LH) plays a central role in female reproductive physiology, regulating ovulation and supporting normal ovarian function. At Intercoastal Health, LH is evaluated as part of a comprehensive functional medicine approach to hormonal health, helping identify patterns of imbalance that may contribute to irregular cycles, fertility concerns, or broader endocrine disruption.
Luteinizing hormone (LH) is a gonadotropin produced by the anterior pituitary gland and is a central regulator of female reproductive physiology. LH coordinates with follicle-stimulating hormone (FSH) to regulate the menstrual cycle, trigger ovulation, and support progesterone production.
FSH → follicle development
Estrogen rise → LH surge
LH supports corpus luteum
Progesterone maintains endometrium
(Ranges may vary by laboratory and assay method)
| Cycle Phase | Reference Range |
|---|---|
| Follicular Phase | 1.90 – 12.50 mIU/mL |
| Ovulatory Phase | 8.70 – 76.30 mIU/mL |
| Luteal Phase | 0.50 – 16.90 mIU/mL |
| Post-Menopausal | 10.00 – 54.70 mIU/mL |
Individualized care • Medically supervised • Lab-guided treatment
Potential Causes
Normal mid-cycle LH surge
Polycystic Ovary Syndrome (PCOS)
Ovarian hypofunction
Premature ovarian insufficiency
Menopause
PCOS Note
An elevated LH:FSH ratio is not universal
More common in lean PCOS phenotypes
Influenced by BMI, cycle timing, and assay sensitivity
Potential Causes
Normal mid-cycle LH surge
Polycystic Ovary Syndrome (PCOS)
Ovarian hypofunction
Premature ovarian insufficiency
Menopause
PCOS Note
An elevated LH:FSH ratio is not universal
More common in lean PCOS phenotypes
Influenced by BMI, cycle timing, and assay sensitivity
Pregnancy
Recent ovulation
Stress or energy deficiency
Heterophilic antibodies
Cross-reactivity with hCG
Gonadotropin fertility medications
Oral contraceptives (LH suppression)
Clomiphene (LH stimulation)
FSH – ovarian reserve and pituitary signaling
Estradiol – follicular activity
Progesterone – ovulation confirmation
Testosterone – PCOS evaluation
Timing matters: LH levels fluctuate significantly across the cycle.
Important Interpretation Considerations
Luteinizing hormone is a key regulator of ovulation, luteal function, and reproductive endocrine signaling. Accurate interpretation requires awareness of cycle timing, physiologic variability, laboratory methods, and patient-specific factors. When integrated with complementary hormone testing, LH provides valuable insight into reproductive and endocrine health.
Experiencing symptoms that may reflect hormonal imbalance? A comprehensive medical evaluation is the first step toward accurate diagnosis and individualized care.
Personalized care • Clinician-directed • Data-driven treatment
Business Hours
Monday: 9AM – 6PM
Tuesday: 9AM – 6PM
Wednesday: 9AM – 6PM
Thursday: 9AM – 6PM
Friday: 9AM – 6PM
Saturday: Closed
Sunday: Closed
Comprehensive care with a whole person approach, specializing in injury management, wellness, and longevity.
3874 San Jose Park Drive
Suite 5
Jacksonville, Florida 32217
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