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The Follicle Stimulating Hormone (FSH) test measures the level of FSH — a pituitary hormone that drives egg maturation in women...
Also known as: FSH Test · FSH Level Test · Follicle Stimulating Hormone Blood Test · Gonadotropin Test
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*Inclusive of home collection charges
The Follicle Stimulating Hormone (FSH) test measures the level of FSH — a pituitary hormone that drives egg maturation in women and sperm production in men — in the blood. FSH is one of the two gonadotropins (alongside LH) that regulate reproductive function through the hypothalamic-pituitary-gonadal axis. In women, FSH is a key indicator of ovarian reserve and menopausal status; elevated FSH indicates diminishing ovarian function. In men, elevated FSH indicates impaired sperm production or testicular failure. FSH is a fundamental component of fertility workups for both sexes. No fasting required.
Key benefits of this package include:
What Does the Follicle Stimulating Hormone (FSH) Test Measure?
| Level / Result | Possible Interpretation |
|---|---|
| Women — FSH Day 2–3: 3–10 IU/L (Normal) | Good ovarian reserve — normal follicular recruitment expected |
| Women — FSH Day 2–3: 10–20 IU/L (Elevated basal FSH) | Diminished ovarian reserve — reduced egg quantity; fertility specialist consultation recommended |
| Women — FSH > 40 IU/L (Post-menopausal range) | Ovarian failure or menopause — natural menopause if age-appropriate; POI if below age 40 |
| Men — FSH normal (1.5–12.4 IU/L) + azoospermia | Possible obstructive azoospermia (sperm production normal but transport blocked) — surgical sperm retrieval may be possible |
| Men — FSH markedly elevated + azoospermia | Non-obstructive azoospermia (primary testicular failure) — spermatogenesis severely impaired; limited treatment options; genetic testing indicated |
| Children — FSH elevated with breast development or genital growth before age 8 (girls) or 9 (boys) | Precocious puberty — central or peripheral; paediatric endocrinology evaluation required |
| FSH low in adult + low LH + low sex hormones | Hypogonadotropic hypogonadism — pituitary or hypothalamic failure; MRI pituitary required |
Important Note: FSH must be interpreted alongside LH, estradiol (in women), testosterone (in men), AMH (Anti-Mullerian Hormone — the most consistent ovarian reserve marker), and clinical context. In women, the day of the menstrual cycle at blood collection is critical — Day 2–3 FSH for ovarian reserve is very different from mid-cycle FSH. A single elevated basal FSH is more clinically significant than a single normal result. All results must be reviewed by a reproductive endocrinologist or gynaecologist.
FSH vs. AMH for Ovarian Reserve — Understanding Both: FSH and AMH (Anti-Mullerian Hormone) are both used to assess ovarian reserve, but they measure different aspects. FSH is cycle-dependent — it varies day to day and reflects the pituitary's response to declining ovarian function. AMH is produced continuously by small antral follicles and is the most consistent, cycle-independent marker of ovarian reserve — it can be measured on any day of the cycle. AMH is now generally preferred over FSH for ovarian reserve assessment in fertility clinics. However, elevated basal FSH remains clinically meaningful — particularly as a predictor of IVF response. Both tests provide complementary information.
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