Lab test
FSH Blood Test
FSH Blood Test can be ordered without a referral, and this guide covers what to expect. This test measures Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH) levels in your blood.
What this test is
FSH and LH are crucial hormones produced by the pituitary gland that play a significant role in reproductive health for both males and females. They are important for regulating the development and function of the reproductive organs.
What it measures
- Follicle-Stimulating Hormone (FSH) — reflects the stimulation of egg or sperm production
- Luteinizing Hormone (LH) — reflects the triggering of ovulation or testosterone production
What the test involves
This test requires a standard blood draw. A healthcare professional will collect a small sample of your blood, typically from a vein in your arm.
Why it is often ordered
Clinicians may order this test to help evaluate reproductive health concerns, assess fertility issues, or investigate irregularities in menstrual cycles. It can also be used to check for certain pituitary gland conditions.
Preparation
Follow the specific preparation instructions provided by the laboratory. This may include fasting or avoiding certain medications before your blood draw.
How results are reported
Your results will indicate the measured levels of FSH and LH. Reference ranges, which help interpret these levels, vary between laboratories and may depend on factors like age and sex.
Before you go
- Fasting requirements
- Best day of menstrual cycle for collection (if applicable)
- Specific preparation instructions
FAQ
Frequently asked questions
What is FSH?
Follicle-Stimulating Hormone (FSH) is a hormone produced by the pituitary gland. In females, it stimulates the ovaries to produce eggs. In males, it stimulates sperm production.
What is LH?
Luteinizing Hormone (LH) is another hormone made by the pituitary gland. In females, a surge in LH triggers ovulation. In males, it stimulates the testes to produce testosterone.
Can this test be done at any time?
For females, the timing of this test can be important for accurate interpretation, especially when evaluating menstrual cycles. It is best to confirm the optimal collection time with your healthcare provider or the laboratory.
How are FSH and LH levels affected by age?
FSH and LH levels naturally change throughout a person's life, particularly during puberty, reproductive years, and menopause. Reference ranges are often adjusted based on age and sex.
Related
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Locations
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