LH Test (Luteinizing Hormone): Purpose, Procedure, Normal Levels & Results
About LH Test (Luteinizing Hormone)
| Field | Value |
|---|---|
| Also Known As | Interstitial Cell Stimulating Hormone Test, ICSH Test, Lutropin Test, LH Test |
| Sample Type | Serum (venous blood) |
| Fasting Required | No fasting required; avoid biotin supplements for 72 hours before the test |
| Report Time | 1 Day |
| Recommended For | All genders and ages, for specific indications such as fertility concerns, menstrual irregularities, puberty disorders, and pituitary evaluation |
| Price | Starting at ₹550 |
What is a Luteinizing Hormone (LH) Test?
The Luteinizing Hormone (LH) test measures the level of LH in your blood. LH is a hormone produced by a small gland at the base of the brain called the pituitary gland. It plays a key role in reproductive function in both men and women.
Also known as the Lutropin test, the ICSH test or the LH test, it is typically prescribed to investigate fertility problems, irregular periods, puberty concerns, or suspected pituitary disorders. A small blood sample drawn from a vein in your arm is used for this test.
What Does a Luteinizing Hormone (LH) Test Measure?
The LH test measures a single hormone, LH, but its role differs depending on your sex and life stage. Here is what LH does in the body:
- In women, LH helps regulate the menstrual cycle and triggers the release of an egg from the ovary, a process called ovulation.
- In men, LH signals the testes to produce testosterone, which is essential for sperm production and overall male reproductive health.
- In children, LH is involved in the maturation of early reproductive cells and is a key marker of puberty onset.
- In both sexes, LH works alongside follicle-stimulating hormone (FSH) to support normal reproductive function.
Why is a Luteinizing Hormone (LH) Test Done?
The Lutropin test is ordered for a range of reproductive and hormonal concerns. A doctor may recommend it when certain symptoms are present or when a specific condition is suspected.
Common Symptoms That May Require This Test
Your doctor may ask for an LH test if you experience any of the following:
- Irregular or absent menstrual periods
- Difficulty conceiving or unexplained infertility
- Signs of early or delayed puberty in children
- Hot flushes or symptoms associated with menopause
- Low libido or sexual dysfunction in men or women
Conditions This Test Can Help Detect
The Luteinizing Hormone test can assist in identifying several conditions:
- Infertility, including finding its cause and predicting when ovulation may occur
- Polycystic ovary syndrome (PCOS), a hormonal condition affecting the ovaries
- Primary ovarian insufficiency and hypothalamic amenorrhoea (absence of periods due to a brain-hormone signalling problem)
- Hypogonadism, where the ovaries or testes produce insufficient hormones, and distinguishing whether the cause lies in the gonads or the pituitary gland
- Early or delayed puberty in children
- Perimenopause or menopause, confirmed when periods have stopped for 12 consecutive months
- Pituitary gland disorders, since LH is among the first hormones affected when the pituitary is not functioning normally
How to Prepare and What to Expect
Preparing for the ICSH test is straightforward. There are a few simple steps to follow before your appointment.
Do You Need to Fast?
No, fasting is not required before the Luteinizing Hormone (LH) test. You can eat and drink normally on the day of your sample collection.
However, you should stop taking biotin (vitamin B7) supplements at least 72 hours before the test. Biotin can interfere with the test's measurement process and may lead to inaccurate results.
Practical Tips Before Your Test
The following tips will help ensure your results are as accurate as possible:
- Bring a detailed clinical history including your symptoms, previous test results, and relevant medical history, as this is required for the test.
- If you are a woman of childbearing age, your doctor may ask you to get the test done on a specific day of your menstrual cycle. For baseline hormone levels, this is usually day 2 or 3; for ovulation tracking, a mid-cycle test may be needed.
- Tell your doctor about all medicines you take, including birth control pills or hormone therapy, as these can affect LH levels.
- Avoid multivitamins or dietary supplements containing biotin before the test.
Step-by-Step Procedure
The blood sample collection for the LH test is quick and straightforward. Here is what to expect:
- A trained phlebotomist will clean the skin on your inner arm with an antiseptic wipe
- An elastic band (tourniquet) is placed around your upper arm to make the veins more visible
- A small needle is gently inserted into a vein, and approximately 3 ml of blood is collected into a yellow-capped gel tube
- The entire process usually takes just a few minutes
- Once the sample is collected, the needle is removed and gentle pressure is applied to the site, followed by a small bandage
- The sample is stored at 2 to 8 degrees Celsius and dispatched to the laboratory for testing by the EIA (enzyme immunoassay) method
Factors That Can Affect Accuracy
Certain factors may influence your LH test results:
- The phase of your menstrual cycle, since LH levels change throughout the cycle and peak at ovulation
- Biotin supplements taken close to the test date
- Medications such as hormonal contraceptives or hormone replacement therapy
- Stress, low body weight, or excessive physical exercise
- Conditions such as high prolactin levels or pituitary tumours
Understanding Your Luteinizing Hormone (LH) Test Results
Your results must be read alongside other hormone tests and reviewed by a qualified doctor. The table below shows general reference ranges for LH levels.
| Group | Normal Range | Unit |
|---|---|---|
| Females, Follicular phase | 1.68 to 15 | IU/L |
| Females, Mid-cycle peak (ovulation) | 21.9 to 56.6 | IU/L |
| Females, Luteal phase | 0.6 to 16.3 | IU/L |
| Females, Post-menopausal | 14.2 to 52.3 | IU/L |
| Males (adults) | 1.8 to 8.6 | IU/L |
| Children (pre-pubertal girls) | 0.03 to 3.9 | IU/L |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Some situations naturally affect LH levels and should be considered when reviewing results:
Women approaching or in menopause will naturally show higher LH levels as ovarian function declines. This is expected and not a cause for concern on its own.
Women with PCOS may have LH levels within the normal range, but the LH-to-FSH ratio is often two to three times higher than normal. For example, an LH level of around 18 IU/L alongside an FSH level of around 6 IU/L may indicate PCOS.
Hormonal contraceptives, hormone replacement therapy, chronic stress, excessive exercise, and significant underweight can all suppress LH levels and contribute to low results.
How to Maintain Healthy Hormone Levels
General lifestyle habits can support healthy hormone balance:
- Maintain a healthy body weight, since being significantly underweight or overweight can disrupt hormone signalling.
- Manage stress through adequate sleep, regular moderate exercise, and relaxation practices.
- Avoid taking biotin supplements in high doses unless prescribed, as they can interfere with immunoassay-based hormone tests.
Lupin Diagnostics Luteinizing Hormone (LH) Test Price and Home Collection
The LH test is available at Lupin Diagnostics, starting at ₹550, with home sample collection available across cities. The table below shows city-wise approximate pricing.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 600 |
| CHENNAI | 500 |
| HYDERABAD | 500 |
| KOLKATA | 600 |
| NAVI MUMBAI | 550 |
| PUNE | 525 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your LH test online at Lupin Diagnostics is simple:
- Select the Luteinizing Hormone (LH) test on the Lupin Diagnostics website
- Choose your city and preferred time slot
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre
- Receive your report via email or WhatsApp within 1 day
Home Collection
Lupin Diagnostics offers LH test home collection across multiple cities, allowing a certified phlebotomist to visit your home at a time that suits you. All samples are processed in NABL-accredited laboratories to ensure accurate and reliable results. Your digital report is delivered securely via email or WhatsApp.
Frequently Asked Questions
The Luteinizing Hormone (LH) test is used to investigate a range of reproductive and hormonal conditions. Common reasons include evaluating infertility, predicting ovulation, diagnosing PCOS, assessing puberty concerns in children, and checking pituitary gland function.
No fasting is needed before the LH test. You can eat and drink normally. However, avoid biotin supplements (vitamin B7) for at least 72 hours before testing, as they can interfere with the results.
The best time depends on what your doctor is looking for. For baseline hormone levels, the test is usually done on day 2 or 3 of the menstrual cycle. For fertility tracking or ovulation prediction, mid-cycle testing or multiple tests across the cycle may be recommended.
Yes. In men, LH signals the testes to produce testosterone, which is necessary for sperm production and male reproductive health. The test is used to evaluate male infertility, low testosterone levels, and testicular function.
In women not near ovulation, high LH may indicate menopause, PCOS, or premature ovarian insufficiency. In men, raised LH can point to testicular problems or conditions such as Klinefelter syndrome. In children, high LH may suggest early (precocious) puberty.
Low LH levels may be linked to pituitary or hypothalamic dysfunction, hypothalamic amenorrhoea, being significantly underweight, or certain medications such as hormonal contraceptives. Your doctor will assess the result alongside other hormonal tests and your clinical history.
Yes. Lupin Diagnostics offers LH test home collection across cities. A trained phlebotomist visits your home to collect the blood sample. Results are delivered digitally within 1 day through email or WhatsApp.
LH Test (Luteinizing Hormone): Purpose, Procedure, Normal Levels & Results
