Quick Facts
- Sample: Blood
- Fasting: No fasting is required. Stop biotin consumption at least 72 hours prior to collection.
- Turnaround: 1-2 days. May take longer based on weather, holiday, or lab delays.
What This Test Measures
This test measures follicle-stimulating hormone (FSH), a hormone made by the pituitary gland, a small gland located at the base of your brain. FSH is a stimulating hormone that plays a role in reproduction. It supports the development of eggs in women and sperm in men. This test reports your circulating FSH level as measured directly in your blood.
FSH production is part of a signaling pathway that includes the hypothalamus, pituitary gland, and reproductive organs (ovaries or testicles). Because FSH is a stimulating hormone rather than the hormones produced by the ovaries or testicles themselves, this test reflects pituitary signaling activity and does not directly measure hormone output from the reproductive organs.
Benefits
- Measures circulating FSH levels from a blood sample
- Helps evaluate possible fertility or reproductive concerns
- Supports assessment of pituitary or hypothalamic function
- Provides objective lab data to discuss with your provider
- Requires no fasting before your appointment
Who Is This Test For?
- Women having difficulty getting pregnant
- Women with irregular or absent menstrual periods
- Men with a low sperm count or decreased sex drive
- Men with low muscle mass or whose partner has not conceived
- Individuals with symptoms suggesting a pituitary or hypothalamic disorder
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. What is the purpose of this hormone test?
This test measures follicle-stimulating hormone (FSH), a stimulating hormone produced by the pituitary gland. FSH signals the ovaries or testicles to support egg and sperm development. Measuring FSH may help a healthcare provider evaluate fertility concerns, menstrual irregularities, or possible pituitary or hypothalamic issues. This test does not diagnose any condition on its own.
2. Who would benefit from this test?
Women having difficulty conceiving or experiencing irregular or absent periods may benefit from this test. Men with a low sperm count, decreased sex drive, or low muscle mass, or whose partner has not conceived, may also benefit. Individuals with symptoms suggesting a pituitary or hypothalamic disorder may consider this test as well.
3. When should I order this test?
You may consider ordering this test if you or your partner are having trouble conceiving, if your menstrual cycle has become irregular or stopped, or if you are experiencing symptoms that may relate to reproductive or pituitary function. This test provides one piece of information for a broader evaluation by your healthcare provider.
4. How does this test differ from other hormone tests?
This test measures FSH, a stimulating hormone released by the pituitary gland, rather than the hormones directly produced by the ovaries or testicles. FSH signals reproductive organs but does not represent their hormone output. This distinction matters when comparing results to tests that measure hormones produced by the ovaries or testicles directly.
5. Do I need to fast before this test?
No fasting is required for this test. You should stop biotin consumption at least 72 hours prior to your blood collection.
6. How quickly will I get results?
Results are typically available in 1-2 days. Turnaround may take longer based on weather, holidays, or lab delays.
7. How do I interpret the results?
FSH results are interpreted in the context of your symptoms, medical history, sex, age, and, for women, menstrual cycle timing. Because FSH is a stimulating hormone, an abnormal result reflects pituitary signaling and does not by itself confirm a specific reproductive or hormonal condition. FSH is often reviewed alongside other hormone measurements and clinical findings. A single normal result does not rule out an underlying condition. Discuss your results with a qualified healthcare provider for a full interpretation.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
8. What should I do if my results are abnormal?
If your FSH results fall outside the expected range, review them with a qualified healthcare provider. They can help determine whether additional evaluation or testing is appropriate based on your health history and symptoms. Do not attempt to interpret or act on abnormal results without professional guidance.
9. How often should I get tested?
Testing frequency should be determined as directed by your healthcare provider, based on your individual health history and reason for testing. There is no standard repeat testing schedule for this test.
Pre test preparation
No fasting is required for this test. You should stop biotin consumption at least 72 hours prior to your blood collection.
