Luteinizing Hormone (LH)
- Sample Type
- Standard
- Fasting
- No
- Unit
- mIU/mL
Luteinizing Hormone (LH) is a gonadotropin produced by the anterior pituitary gland. In females, a mid-cycle surge of LH triggers ovulation and the development of the corpus luteum. In males, LH stimulates Leydig cells in the testes to produce testosterone. Within the LH/FSH panel, it is essential for diagnosing infertility, polycystic ovary syndrome (PCOS), pituitary disorders, and primary or secondary gonadal failure.
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Why Context Matters
LH is secreted in pulses, meaning a single random sample may not represent the average daily level. In females, results must be strictly interpreted based on the specific phase of the menstrual cycle. Supplements like Biotin (Vitamin B7) can interfere with laboratory immunoassay results.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Luteinizing Hormone (LH):
Official Sources
Research & Guidelines
- PubMed: Luteinizing Hormone (LH) Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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