Lab marker · Low

Low Follicle-Stimulating Hormone (FSH): what it means

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

Reference range: Men 1.5–12.4 mIU/mL; women follicular 3.5–12.5, ovulation 4.7–22, luteal 1.7–7.7, postmenopausal 25–135

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What a low Follicle-Stimulating Hormone (FSH) can mean

  • Hypogonadotropic hypogonadism — pituitary tumour, head trauma, congenital.
  • Hyperprolactinaemia — high prolactin suppresses FSH and LH together.
  • Eating disorders, athletic amenorrhoea — hypothalamic suppression.
  • Oral contraceptives — exogenous feedback suppression.
  • Late luteal phase — physiologically low; cycle-day context required.

When to discuss with a doctor

FSH is the standard screen for menopause and ovarian reserve, paired with LH and (if appropriate) estradiol + AMH. A rising trend in a woman in her 30s–40s is more informative than a single number. In men, isolated high FSH with normal testosterone often surfaces from an infertility workup. Mediora.AI shows FSH next to LH so the pattern is visible; reproductive workup belongs with an endocrinologist, gynaecologist or fertility specialist.

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.