---
title: "What does a low FSH mean?"
type: biomarker-interpretation
url: "https://www.test-well.com/biomarkers/fsh/low"
biomarker: FSH
direction: low
reference_range:
  - "Male, age 18+: 1.50 – 12.4 mIU/mL"
  - "Female, age 18+, varies by cycle phase: 1.40 – 25.0 mIU/mL"
reviewed_at: 2026-09-06
review_status: reviewed
date_published: 2026-09-05
---

# What does a low FSH mean?

> Low FSH — usually with low LH — means the pituitary or hypothalamus is under-signalling. Common causes are hormonal contraception, low body weight, eating disorders, heavy exercise, stress, high prolactin and pituitary disorders; in men it accompanies secondary hypogonadism from obesity, opioids, anabolic steroids or pituitary disease. It's also normal in pregnancy and mid-cycle just after the surge.


## What is the normal range for FSH?

- Male, age 18+: 1.50 – 12.4 mIU/mL
- Female, age 18+, varies by cycle phase: 1.40 – 25.0 mIU/mL



## What are the common causes of low FSH?

1. Hormonal contraception, hormone therapy, anabolic steroids
2. Functional hypothalamic suppression: low body weight, eating disorders, over-exercise, stress
3. High prolactin
4. Pituitary tumors or damage, hemochromatosis
5. Pregnancy
6. Opioids, glucocorticoids

## What symptoms go with low FSH?

- Absent or infrequent periods, infertility
- Men: low libido, low testosterone symptoms

## What do clinicians usually check next?

- LH, estradiol or testosterone, prolactin, TSH
- Review medications and body weight history
- Pituitary evaluation when unexplained

Follow-up tests at TestWell: [TSH (Thyroid Stimulating Hormone)](https://www.test-well.com/tests/tsh) ($26.99), [TSH + Free T4](https://www.test-well.com/tests/tsh-with-free-t4) ($27.99), [LH (Luteinizing Hormone)](https://www.test-well.com/tests/luteinizing-hormone) ($36.99), [Estradiol (E2)](https://www.test-well.com/tests/estradiol) ($35.99), [Prolactin](https://www.test-well.com/tests/prolactin) ($39.99).

## How do you recheck FSH?

| Test or panel | Type | Price | Fasting | Results |
| --- | --- | --- | --- | --- |
| [Women's Fertility Essentials](https://www.test-well.com/tests/female-fertility-panel) | Panel (5 tests) | $119.99 | No | 3–5 business days |
| [Menopause Assessment Panel](https://www.test-well.com/tests/menopause-panel) | Panel (8 tests) | $179.99 | No | 2–4 business days |
| [Women's Hormone Panel](https://www.test-well.com/tests/womens-hormone-panel) | Panel (11 tests) | $239.99 | No | 3–5 business days |
| [FSH (Follicle Stimulating Hormone)](https://www.test-well.com/tests/fsh) | Test | $29.99 | No | 2–4 business days |

Plus one $6 lab processing fee per order; physician authorization included.

## Common questions

### Is a low FSH good for fertility?

Not by itself — a low FSH with a low estradiol and absent periods means the ovaries aren't being stimulated. Fertility assessment looks at the whole axis.

## Related

- [What does a high FSH mean?](https://www.test-well.com/biomarkers/fsh/high)
- [FSH reference ranges](https://www.test-well.com/biomarkers/fsh)
- [Total Testosterone reference range](https://www.test-well.com/biomarkers/total-testosterone)
- [Free Testosterone reference range](https://www.test-well.com/biomarkers/free-testosterone)
- [SHBG reference range](https://www.test-well.com/biomarkers/shbg)

## Sources

- [Mayo Clinic Labs](https://www.mayocliniclabs.com/test-catalog/overview/8669)

---

Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-09-06. Review policy: https://www.test-well.com/editorial-policy

Canonical page: https://www.test-well.com/biomarkers/fsh/low
Machine-readable catalog: https://www.test-well.com/api/catalog.json · MCP server: https://www.test-well.com/mcp · Overview for agents: https://www.test-well.com/llms.txt

Prices are cash-pay, in USD, and include physician authorization; every order adds one flat $6 lab processing fee. Educational content is not a diagnosis — discuss results with a clinician.