What FSH tells you
Hormones are chemical messengers involved in energy, mood, body composition, and reproductive health. This group covers the key hormones a clinician may review when looking at these areas.
Which Honed panels include FSH
FSH is measured in the Hormone Panel. Every sample is collected at a pathology collection centre and processed at a NATA-accredited laboratory against RCPA reference ranges, with personalised plain-English commentary in your secure online report.
Why FSH matters
Follicle-Stimulating Hormone (FSH) is a pituitary hormone that works alongside LH to regulate reproductive function. In men, FSH stimulates spermatogenesis (sperm production) in the seminiferous tubules. In women, FSH stimulates follicle development and oestrogen production during the follicular phase of the menstrual cycle. FSH is one of the primary markers clinicians use to assess ovarian reserve in women and testicular function in men.
The range explained
Low levels
Low FSH (below 1.5 IU/L in men, below 4 IU/L in women) suggests reduced pituitary-gonadal signalling, potentially from overtraining, undereating, or hypothalamic dysfunction. In women, low FSH early in the cycle may indicate low ovarian reserve.
Normal range
Reference ranges: men 2–8 IU/L, women 3–8 IU/L (follicular phase), rising slightly in the luteal phase and significantly postmenopause. These represent normal gonadal stimulation.
High levels
Elevated FSH (above 8 IU/L in men, above 8 IU/L in women during follicular phase) may indicate primary gonadal dysfunction or, in women, reduced ovarian reserve. Postmenopausal FSH is naturally elevated above 30 IU/L.
What affects FSH
- Training: Overtraining suppresses FSH. Appropriate training-to-recovery balance supports FSH production.
- Nutrition: Adequate energy, protein, and micronutrients support FSH production. Undereating or disordered eating impairs FSH.
- Sleep: Sleep supports FSH pulsatility. Poor sleep disrupts the HPG axis.
- Stress: Chronic stress suppresses FSH through elevated cortisol. Stress management supports reproductive health.
When to retest
Every 12 weeks when assessing reproductive or hormonal health; every 12 months for general health. In women, follicular phase testing (days 3–5) is standard.
Why athletes care
Athletes may monitor FSH as part of assessing overall HPG axis health and recovery status; suppressed FSH alongside low testosterone indicates overtraining or hormonal stress.
Related hormones markers
FAQ
What does the FSH blood test measure?
Follicle-Stimulating Hormone, which works with LH in reproductive regulation. In women it is one marker a clinician may consider in relation to ovarian reserve.
Which Honed Health panels include FSH?
FSH is included in the Hormone panel.
What unit is FSH measured in?
FSH is reported in IU/L, measured at NATA-accredited laboratories against RCPA reference ranges, with personalised plain-English commentary in your secure report.