Lab test
FSH Blood Test
This blood test measures follicle-stimulating hormone (FSH) and luteinizing hormone (LH), two hormones released by the pituitary gland that regulate the reproductive system.
- Typical price
- From $118
- Results
- 1-3 business days
- Preparation
- See preparation notes below
- Sample
- Blood draw or sample collection at a local center
About this test
This blood test measures follicle-stimulating hormone (FSH) and luteinizing hormone (LH), two hormones released by the pituitary gland that regulate the reproductive system. In women, they coordinate the menstrual cycle and egg development; in men, they support sperm production and testosterone production. Because the two hormones work as a pair, measuring them together gives more context than either alone. The test is ordered to investigate irregular or absent periods, fertility concerns, suspected pituitary problems, and symptoms of low testosterone. Results depend on sex, age, and, in women, the phase of the menstrual cycle, so these details guide interpretation.
What this test measures
- Follicle-Stimulating Hormone (FSH) A pituitary hormone that drives egg maturation in women and sperm production in men.
- Luteinizing Hormone (LH) A pituitary hormone that triggers ovulation in women and stimulates testosterone in men.
Who this test may be right for
- Women with irregular, absent, or difficult menstrual cycles
- Individuals exploring possible causes of infertility
- Men being evaluated for low testosterone or sperm production
- People with suspected pituitary or hypothalamic concerns
Before your visit
- Cycle timing matters in women; confirm the preferred collection day with your provider
- Report hormone medications or fertility treatments to the laboratory
- Follow any additional instructions that come with your order
Understanding your results
FSH and LH are compared against sex- and age-specific reference ranges, with cycle phase considered in women. High levels in women may be associated with reduced ovarian function, while high levels in men can suggest reduced testicular response; low levels in either sex may point toward pituitary or hypothalamic causes. Because the two hormones act together, a healthcare provider should interpret the results as a pair with the wider hormone picture.
Order this test online
- Buy online in a few minutes - no doctor's visit needed for most tests.
- Sample collection at a patient service center near you.
- Results are typically ready within 1-3 business days.
- Secure, lab-reviewed results delivered to your account.
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Questions people ask
Why are FSH and LH tested together?
FSH and LH act as a pair in regulating the reproductive system, so measuring both gives a fuller picture than either alone.
What can a high FSH level mean in women?
A high FSH can be associated with reduced ovarian function or menopause, and it is interpreted with estradiol, age, and symptoms.
Why would a man have FSH and LH tested?
In men, these hormones support sperm and testosterone production, so they may be measured when fertility or testicular function is evaluated.
Does the day of my cycle affect FSH and LH?
Yes. Both vary across the menstrual cycle, so the collection day is recorded and considered when results are assessed.
What does the FSH Blood Test measure?
Our Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH) test measure levels of these two hormones in the blood.
Do I need to fast before this test?
Follow the lab's instructions.
How long do results take?
Most FSH Blood Test results are released in 1-3 business days. Specialty testing can take longer.
Is this test right for me?
This page is educational and not medical advice. Talk to a licensed healthcare provider about which tests fit your situation.
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Laboratory services are provided by independent, CLIA-certified testing partners. Availability, pricing, and turnaround times can vary by location and are confirmed at checkout.