LH (Luteinizing Hormone)
LH is a pituitary hormone that triggers ovulation in women and testosterone production in men. It is interpreted together with FSH and sex hormones.
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Normal ranges
Women: varies by cycle phase (follicular ~2–13 IU/L, peak ~14–96). Men: ~1–9 IU/L.
Units: IU/L
Causes of deviations
Low levels:
Pituitary disorders, stress, low body weight, excess sex steroids.
High levels:
Menopause, PCOS, primary gonadal failure.
When to see a doctor
For fertility evaluation, irregular cycles, or low testosterone symptoms.
Related biomarkers
Panels
Hormone panel
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