Karyotyping by G Banding Test: Booking, Price, and Results
About Karyotyping by G Banding Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Chromosome Analysis Test, Cytogenetic Analysis Test, G-Banded Karyotype Test, Chromosome Karyotyping Test, GTG-Banding Test |
| Sample Type | Peripheral blood (sodium heparin tube) |
| Fasting Required | No fasting required |
| Report Time | 10 days |
| Recommended For | All genders and ages; commonly advised for couples with recurrent miscarriage, infertility, suspected genetic syndromes, prenatal screening, and blood cancers |
| Price | Starting at ₹3,000 |
What Is a Karyotyping by G Banding Test?
The karyotyping by G banding test is a laboratory test that examines the chromosomes in your cells. Chromosomes are structures inside cells that carry your genetic information. This test checks the number, size, and shape of chromosomes to identify any abnormalities. This test is commonly ordered for couples facing infertility or recurrent miscarriages or when a genetic condition is suspected. This test is also known as the chromosome analysis test, cytogenetic analysis test, G-banded karyotype test, chromosome karyotyping test, or GTG-banding test and requires a small sample of peripheral blood.
What Does a Karyotyping by G Banding Test Measure?
This test produces a picture of all your chromosomes, arranged in a standard format called a karyotype. Here is what the karyotyping by G banding analysis examines:
| Component | What It Tells Us |
|---|---|
| Total chromosome count | Checks whether the cell has the normal number of 46 chromosomes |
| Chromosome structure | Identifies missing, extra, or rearranged segments within chromosomes |
| Sex chromosomes | Confirms whether the 23rd pair is XX (female) or XY (male) |
| Autosomal pairs | Reviews each of the 22 non-sex chromosome pairs for abnormalities |
Why Is a Karyotyping by G Banding Test Done?
A doctor may recommend the karyotyping by G banding test for several reasons, including investigating unexplained health concerns or confirming a suspected genetic condition.
Common Symptoms That May Require This Test
The following symptoms or situations often prompt a doctor to request this test:
- Recurrent miscarriages (two or more unexplained pregnancy losses)
- Difficulty conceiving (infertility in either partner)
- Developmental delays or intellectual disability in a child
- Physical features suggestive of a chromosomal syndrome, such as short stature or ambiguous genitalia
- Abnormal findings on prenatal ultrasound or biochemical screening
- A family history of a known chromosomal condition or rearrangement
Conditions This Test Can Help Detect
The karyotyping by G banding test procedure can help identify a range of chromosomal conditions, including:
- Down syndrome (trisomy 21)
- Edward syndrome (trisomy 18)
- Turner syndrome (missing X chromosome)
- Klinefelter syndrome (extra X chromosome in males)
- Trisomy 13 (Patau syndrome)
- Philadelphia chromosome, associated with chronic myeloid leukaemia
- Other chromosomal translocations, inversions, deletions, and duplications
Karyotyping by G Banding Test During Pregnancy
Pregnancy is one of the most common reasons a doctor orders the karyotyping by G banding test. It can reveal whether you or your partner carry chromosomal changes that may be passed to a baby. Foetal karyotyping is particularly recommended when the pregnant parent is 35 or older or when prenatal scans or blood tests show unusual findings.
How to Prepare and What to Expect
No special preparation is needed for karyotyping by G banding test. However, a few practical steps can help ensure your sample is processed correctly.
Do You Need to Fast?
No, fasting is not required before this test. You can eat and drink as normal before your sample is collected. Always follow specific instructions provided by your doctor or laboratory at the time of booking.
Practical Tips Before Your Test
Keep the following points in mind before your appointment:
- Bring a detailed clinical history, including your symptoms, previous test results, and family history, as this is required for the test
- Inform your doctor or the collection team about any medications you are currently taking
- Tell the laboratory if you are undergoing chemotherapy, as it can cause chromosome breaks that may affect results
- Drink adequate water to keep your veins accessible for blood collection
- Wear clothing with sleeves that roll up easily for a comfortable blood draw
Step-by-Step Procedure
- A trained phlebotomist cleans the inside of your elbow with an antiseptic swab.
- A small amount of blood (3 ml) is drawn from a vein and collected in a green-top sodium heparin tube. The tube is gently inverted several times to prevent the blood from clotting.
- The sample is labelled and stored at 2 to 8°C before being transported promptly to the laboratory, as fresh and living cells are essential for this test.
- In the laboratory, white blood cells called lymphocytes are stimulated to divide in a controlled cell culture. A special agent is then introduced to pause the cells at the stage where chromosomes are most visible.
- The chromosomes are stained using the Giemsa (G-banding) technique, which creates a unique pattern of light and dark bands on each chromosome.
- A laboratory specialist examines and photographs the chromosomes under a microscope. The results are compiled into a karyotype report.
Factors That Can Affect Accuracy
The following factors can influence how well the test performs:
- Using the wrong blood tube (EDTA is not acceptable; only sodium heparin is suitable)
- Delays in transporting the sample to the laboratory
- Frozen or poorly stored specimens, which cannot be processed
- Ongoing chemotherapy at the time of sample collection
- Poor quality of the cell culture or metaphase spreads obtained during processing
Understanding Your Karyotyping by G Banding Test Results
Results from this test require careful interpretation by a qualified doctor or genetic counsellor. The table below shows what a normal karyotype looks like:
| Parameter | Normal Finding |
|---|---|
| Total chromosomes | 46 |
| Female karyotype | 46,XX |
| Male karyotype | 46,XY |
| Autosomal pairs | 22 pairs (chromosomes 1 to 22) |
| Sex chromosome pair | 1 pair (XX or XY) |
A normal result means the sample contained 46 chromosomes without any detected changes in structure. An abnormal result may indicate extra or missing chromosomes, or structural changes such as translocations, inversions, deletions, or duplications.
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
Chemotherapy can cause chromosome breaks that may interfere with results, so informing the laboratory about any ongoing treatment is important. G-banding detects large chromosomal changes (typically greater than 5 megabases in size). Subtle rearrangements, low-level mosaicism (where only some cells carry an abnormality), and very small deletions or duplications may not be visible with this method. Additional molecular testing may be recommended in such cases.
How to Maintain Healthy Levels
Chromosomal patterns are determined at conception and cannot be altered through lifestyle changes. However, the following steps can support informed decision-making:
- Seek genetic counselling before pregnancy if you have a family history of chromosomal conditions
- Discuss prenatal testing options with your doctor early in pregnancy, particularly if you are over 35
- Follow your doctor's guidance on further testing if an abnormality is detected
Lupin Diagnostics Karyotyping by G Banding Test Price and Home Collection
The karyotyping by G banding test cost at Lupin Diagnostics starts at ₹3,000, with home sample collection available across cities in India. The table below shows indicative prices:
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 3000 |
| CHENNAI | 3000 |
| HYDERABAD | 3000 |
| KOLKATA | 3000 |
| NAVI MUMBAI | 3000 |
| PUNE | 3000 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Karyotyping by G banding test online booking is straightforward:
- 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
Lupin Diagnostics offers karyotyping by G banding test home collection across multiple cities in India. All samples are processed in NABL-accredited laboratories under the required temperature conditions. Your digital report is shared directly via email or WhatsApp once ready.
Frequently Asked Questions
G-banding is a staining technique used to make chromosomes visible under a microscope. The Giemsa stain produces a characteristic pattern of light and dark bands on each chromosome, allowing specialists to identify individual chromosomes and spot any structural or numerical changes.
An abnormal result means that unusual changes were found in the number or structure of chromosomes. This could indicate conditions such as Down syndrome, Turner syndrome, or chromosomal rearrangements linked to fertility problems. Your doctor or a genetic counsellor will explain what the findings mean for you and discuss any next steps.
This test is recommended for individuals who have experienced two or more unexplained miscarriages, couples facing infertility, people with physical features suggestive of a chromosomal syndrome, and those with a family history of a chromosomal condition or rearrangement.
No. This test is effective at detecting large chromosomal abnormalities, such as missing or extra chromosomes and major structural changes. However, very small deletions, duplications, or low-level mosaicism may fall below the detection range of G-banding. Your doctor may suggest additional molecular tests if needed.
No fasting is needed. You can eat and drink normally before your appointment. However, always follow specific preparation instructions provided by your doctor.
Clinical history helps the cytogeneticist interpret the findings correctly. Knowing your symptoms, previous test results, family history, and any ongoing treatments, such as chemotherapy, allows the reporting doctor to provide a more accurate and clinically relevant result.
Karyotyping by G Banding Test: Booking, Price, and Results
