Fragile X Mutation-FMR1 Mutation Test: Booking, Price, and Results
About Fragile X Mutation-FMR1 Mutation Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | FMR1 gene test, Fragile X DNA test, FXS genetic test, Fragile X CGG repeat analysis, Martin-Bell syndrome test |
| Sample Type | Whole blood (EDTA tube) |
| Fasting Required | No fasting required |
| Report Time | 15 days |
| Recommended For | Males and females of all ages; particularly children with developmental delays, individuals with a family history of Fragile X, and women with unexplained early menopause or fertility concerns |
| Price | Starting at ₹8,500 |
What is a Fragile X Mutation-FMR1 Mutation Test?
The Fragile X Mutation-FMR1 mutation test is a genetic blood test that examines the FMR1 gene on the X chromosome. It detects changes in this gene that are associated with Fragile X syndrome and related conditions. A small blood sample is collected and analysed using Sanger sequencing, a highly accurate method for reading DNA sequences. This test is also known as the FMR1 gene test or Fragile X DNA test.
What Does a Fragile X Mutation-FMR1 Mutation Test Measure?
The test examines the FMR1 gene at a molecular level to assess three key aspects. Here is what each component tells us:
| Component | What It Assesses |
|---|---|
| CGG trinucleotide repeats | Counts the number of times a specific DNA sequence repeats in the FMR1 gene; the repeat number determines mutation status |
| Methylation status | Distinguishes between premutation and full mutation alleles, helping clarify the clinical picture |
| FMRP protein production | The FMR1 gene normally produces a protein called FMRP, which supports brain development; mutations reduce or stop this production |
Why is a Fragile X Mutation-FMR1 Mutation Test Done?
Doctors recommend the Fragile X Mutation-FMR1 mutation test for a range of clinical situations, from evaluating developmental concerns in children to carrier testing in adults with a relevant family history.
Common Symptoms That May Require This Test
The following symptoms are among the most common reasons a doctor may request this test:
- Delayed speech, language, or motor development in a child
- Intellectual disability or learning difficulties
- Anxiety, hyperactive behaviour, or difficulty concentrating
- Impulsive or fidgety behaviour
- Features suggestive of autism spectrum disorder
- Unexplained fertility problems or early menopause in women
- Tremors or loss of muscle coordination in older adults
Conditions This Test Can Help Detect
This test can help identify a range of FMR1-related conditions, including:
- Fragile X syndrome (FXS), characterised by developmental delay, intellectual disability, and behavioural difficulties
- Autism spectrum disorder, which is present in 50% to 70% of individuals with FXS
- Fragile X-associated primary ovarian insufficiency (FXPOI), where the ovaries stop functioning before the age of 40
- Fragile X-associated tremor/ataxia syndrome (FXTAS), a late-onset neurological condition causing tremors and coordination problems
How to Prepare and What to Expect
The Fragile X Mutation-FMR1 mutation test procedure is straightforward and requires very little preparation. Here is what you need to know before your appointment.
Do You Need to Fast?
No, fasting is not required for this test. You can eat and drink normally before your sample is collected.
Practical Tips Before Your Test
A few simple steps will help ensure a smooth experience:
- Bring a detailed clinical history report, including your symptoms, previous test results, and family history, as this is required for the test
- Inform the laboratory if you have had a bone marrow transplant from another person's donor, as this can interfere with the results
- Let your doctor know about any current medications, though most do not affect this genetic test
- Wear a loose-fitting top or short sleeves for easy access to your arm during the blood draw
- If the test is for a young child, bring a familiar toy or comfort item to help keep them calm
Step-by-Step Procedure
The sample collection for this test follows a simple blood draw process:
- A trained phlebotomist will clean the inside of your arm with an antiseptic solution.
- A sterile needle is gently inserted into a vein, and approximately 2 ml of blood is drawn into an EDTA (lavender-top) tube.
- You may feel a brief, mild sensation during the draw; this passes quickly.
- A cotton pad or bandage is placed on the puncture site to stop any bleeding.
- The labelled sample is stored at 2 to 8 degrees Celsius and dispatched to the laboratory for Sanger sequencing analysis.
- Results are ready within 15 days and are delivered digitally.
Factors That Can Affect Accuracy
Certain situations can influence the reliability of results:
- A previous bone marrow transplant from an allogeneic (another person's) donor
- Blood transfusions received close to the time of testing
- Somatic mosaicism, where different cells carry different genetic material
- Mislabelled samples or incorrect family relationship information provided at booking
- Rare genetic variants or sex chromosome abnormalities that fall outside standard detection patterns
Understanding Your Fragile X Mutation-FMR1 Mutation Test Results
Results from the Fragile X Mutation-FMR1 mutation test are reported in terms of CGG repeat numbers, each range carrying a specific clinical meaning. Your doctor or genetic counsellor will interpret the findings in the context of your personal and family history.
| Category | CGG Repeats | Clinical Meaning |
|---|---|---|
| Normal | 5 to 44 repeats | No increased risk; alleles are stable across generations |
| Intermediate (Grey Zone) | 45 to 54 repeats | May expand in future generations; no direct disease risk currently |
| Premutation | 55 to 200 repeats | Carrier status; associated with FXTAS and FXPOI; offspring at risk of inheriting the full mutation |
| Full Mutation | More than 200 repeats | Associated with Fragile X syndrome |
Disclaimer: 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
Certain circumstances can affect how results are interpreted:
- If you have had a bone marrow transplant from another person's donor, the DNA analysed may reflect the donor's genetics rather than your own, which can produce misleading results.
- Methylation status cannot be assessed on placental tissue specimens or in individuals reported as female.
- A small number of individuals clinically diagnosed with Fragile X syndrome (less than 1%) do not have the typical CGG expansion; they may carry a different type of FMR1 variant, such as a deletion, which requires additional investigation.
How to Maintain Healthy Levels
Because this is a genetic test, lifestyle choices do not change the result or alter your genetic status. However, the following steps can be helpful:
- Seek genetic counselling if you are found to be a carrier or have a full mutation; a counsellor can help you understand your risk and family planning options.
- If a child is diagnosed with Fragile X syndrome, early intervention therapies, including speech therapy, occupational therapy, and behavioural support, can meaningfully improve their development.
- Stay in regular contact with your healthcare team for guidance tailored to your specific situation.
Lupin Diagnostics Fragile X Mutation-FMR1 Mutation Test Price and Home Collection
The Fragile X Mutation-FMR1 mutation test cost at Lupin Diagnostics starts at ₹8,500, and home sample collection is available across cities.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 8500 |
| CHENNAI | 8500 |
| HYDERABAD | 8500 |
| KOLKATA | 8500 |
| NAVI MUMBAI | 8500 |
| PUNE | 8500 |
Disclaimer: Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Getting your Fragile X Mutation-FMR1 mutation test online booking is simple:
- Select the 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 the stipulated turnaround time.
Home Collection
Fragile X Mutation-FMR1 mutation test home collection is available across multiple cities, making it convenient for families with young children or mobility concerns. All samples are processed in NABL-accredited laboratories, ensuring accurate and reliable results. Once ready, your digital report is shared via email or WhatsApp.
Frequently Asked Questions
Fragile X syndrome is the most common form of inherited developmental disability. It occurs when a mutation in the FMR1 gene reduces or stops the production of a protein essential for brain development. The condition can cause intellectual disability, developmental delays, and behavioural challenges.
This test is recommended for children showing unexplained developmental delays or intellectual disability, adults with a family history of Fragile X, and women experiencing fertility problems or early menopause. It may also be offered to known carriers who are planning a family.
Yes, the test involves only a simple blood draw and is safe for children of all ages. There is a minimal risk of brief discomfort, minor bruising, or slight tenderness at the collection site, all of which resolve quickly.
The test is highly accurate. CGG repeat expansion accounts for more than 99% of Fragile X syndrome cases, and tests that measure this region are over 99% sensitive. Sanger sequencing, the method used here, is a well-established and precise technique for DNA analysis.
Yes. Approximately one in 260 women in the general population is a Fragile X carrier. Female carriers often have mild symptoms or none at all, but they can pass the mutation to their children. Testing is important for women with a relevant family history.
A premutation result (55 to 200 CGG repeats) means you are a carrier. You may be at risk for FXTAS or FXPOI yourself, and there is a chance your children could inherit an expanded, full mutation. Genetic counselling is strongly recommended after a premutation finding to help understand what the result means for you and your family.
Prenatal testing through chorionic villus sampling or amniocentesis can determine whether a fetus carries the Fragile X mutation. This is typically offered to known carriers and is performed under medical supervision. Speak to your doctor or genetic counsellor to understand whether prenatal testing is appropriate for you.
Fragile X Mutation-FMR1 Mutation Test: Booking, Price, and Results
