Lab marker · Low

Low Luteinizing Hormone (LH): what it means

A Luteinizing Hormone (LH) result below the normal range is considered low. Here is what a reduced Luteinizing Hormone (LH) can point to, and when it is worth discussing with a doctor.

Reference range: Men 1.7–8.6 mIU/mL; women follicular 1.9–12, ovulation 8–76, luteal 0.5–17, postmenopausal 14–53

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What a low Luteinizing Hormone (LH) can mean

  • Hypogonadotropic hypogonadism — pituitary tumour, head trauma, congenital (Kallmann syndrome).
  • Hyperprolactinaemia — high prolactin suppresses LH.
  • Anorexia nervosa, athletic amenorrhoea — hypothalamic suppression from energy deficit.
  • Chronic illness, severe stress — hypothalamic suppression.
  • Oral contraceptives, anabolic steroids — exogenous feedback suppression.

When to discuss with a doctor

LH is rarely interpreted alone — always paired with FSH, testosterone (men) or estradiol (women), and prolactin. Specific contexts: woman with absent periods, suspected PCOS, infertility, premature menopause; man with low testosterone, infertility, suspected pituitary disease. Mediora.AI shows LH next to FSH and the gonadal hormone so the pattern (primary vs central) is visible; reproductive workup is endocrinology / gynaecology / andrology territory.

Conditions this can relate to

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Mediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.