LH & FSH Fertility Test

Test ID: B-204

Blood Spot Luteinizing (LH) and Follicle Stimulating Hormone (FSH) Test Kit is designed to test LH and FSH in the body.

Blood Spot Luteinizing Hormone (LH), a glycoprotein hormone produced by the anterior pituitary, is essential for reproduction in both men and women. The Luteinizing (LH) Test Kit is designed to test for Luteinizing Hormone (LH) and accurately assesses LH levels in the blood.

In women, controlled by a negative feedback loop involving several ovarian hormones, gonadotropin-releasing hormone (GnRH) is secreted in pulses from the hypothalamus, which stimulates LH production from the pituitary gland. As a result, a surge of LH production lasting around 48 hours occurs at the end of the follicular phase in a regular menstrual cycle. This sudden burst of LH causes luteinisation of the ovarian follicles and triggers ovulation.

In men, LH acts on the Leydig cells of the testes to stimulate the production of testosterone, which is necessary for sexual function and spermatogenesis. LH levels are helpful for the clinical assessment of infertility: low levels in men can result in hypogonadism and insufficient sperm production. In women, LH levels are used to determine the occurrence of ovulation for couples trying to conceive. High LH levels are seen in polycystic ovarian syndrome and in precocious puberty.

Blood Spot Follicle Stimulating Hormone (FSH) Test

The Follicle Stimulating Hormone (FSH) Test is a simple blood spot test designed to accurately measure FSH levels, a key hormone involved in reproductive health for women, men, and children. FSH plays an essential role in regulating fertility, menstrual cycles, sperm production, and puberty.

This test is suitable if you are experiencing fertility issues, irregular or stopped periods, symptoms of menopause or perimenopause, low sex drive, unexplained weight loss or weakness, or concerns about delayed or early puberty. In women, FSH testing helps assess infertility, irregular menstrual cycles, and ovarian or pituitary function. In men, it is used to evaluate sperm production, testicular function, and hormonal disorders.

The test is carried out at home using a simple finger-prick blood spot sample, which you post to our laboratory. Results are available within 3–5 working days after the lab receives your sample and include clear numerical values, visual charts, and expert commentary from a Hormone Specialist PhD doctor, explaining your results and recommended next steps.

Test Result: You will receive your test result 3-5 working days after the laboratory receives your sample. You will see your hormone levels in graphics and numbers on your test result. You will also see laboratory comments by Hormone Specialist PhD Dr in the comments: you will find an analysis of your hormone levels and what to do next.

• Collect samples from the comfort of your home and post them to our lab.
• The test must be used within 12 months after the purchase date.
• The test kit includes a laboratory fee: no additional laboratory cost and tax.
• Customers are responsible for shipping their samples to the laboratory.

How to Use

Why We Partner with ZRT Laboratory

At Hormone Lab UK, all laboratory testing is performed by ZRT Laboratory, a globally recognised CLIA-certified diagnostic and research laboratory specialising in hormone and functional health testing since 1998. Founded by renowned biochemist and breast cancer researcher Dr. David Zava, PhD, ZRT is internationally respected for its scientific innovation, accuracy, and commitment to personalised healthcare.

With more than 11 million tests performed and healthcare professionals in over 96 countries relying on its expertise, ZRT provides advanced testing for hormones, thyroid, fertility, adrenal function, neurotransmitters, cardiometabolic health, vitamin D, heavy metals, and wellness assessments.

ZRT pioneered at-home saliva hormone testing, was the first laboratory to commercialise dried blood spot (DBS) hormone testing, and developed Dried Urine Testing (DUTS), helping make advanced laboratory diagnostics more convenient and accessible.

Using advanced LC-MS/MS and ICP-MS technology, combined with rigorous quality standards, ZRT delivers highly accurate and clinically reliable results. The laboratory’s commitment to research, personalised reference ranges, and quality assurance—including qualification for the CDC Hormone Standardization (HoSt) Program for testosterone and estradiol testing—has established ZRT as one of the world’s most trusted names in hormone and wellness diagnostics.

Through our partnership with ZRT Laboratory, Hormone Lab UK provides customers across the UK and Europe with access to internationally recognised, research-backed laboratory testing designed to support better health decisions.