Sibling DNA Test
Also known as: Sibling Relationship Test, Full Sibling DNA Test, Half Sibling DNA Test
Sibling DNA Test test available at DNA Labs India for ₹24,000. Uses STR Analysis, PCR-based DNA Profiling on Buccal Swab, Blood EDTA Tube, Blood FTA Card samples. Results in Reports are typically delivered within 10 business days after samples reach the laboratory.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Pasupathy Arumugam
Consultant Pathologist · Reg: 21521
Last reviewed: September 7, 2026
Overview
The primary purpose of a Sibling DNA Test is to establish the biological relationship between siblings. This may be needed for legal reasons (e.g., inheritance claims, child custody), immigration applications, or personal curiosity. The test provides conclusive evidence of whether individuals share the same biological parents, helping to resolve doubts and provide clarity.
- Test Code
- 6257
- CPT Code
- 81402
- ICD Code
- Z13.89
- Price
- ₹24,000
- Sample Type
- Buccal Swab, Blood EDTA Tube, Blood FTA Card
- Result Time
- Reports are typically delivered within 10 business days after samples reach the laboratory.
- Fasting Required
- No
- Method
- STR Analysis, PCR-based DNA Profiling
Sample Collection
No special preparation is required. Please carry a valid government-issued ID proof for all participants. If you are providing blood samples, no fasting is needed.
Method: Cheek swab or blood draw
Laboratory Analysis
For buccal swabs, a sterile swab is rubbed on the inside of the cheek for about 30 seconds. For blood samples, a small amount of blood is drawn from a vein. The process is quick and painless.
Report Delivery
You can resume normal activities immediately. There are no restrictions after sample collection.
Timeline: Reports are typically delivered within 10 business days after samples reach the laboratory.
Patient Instructions
About This Test
Who Should Get This Test
The primary purpose of a Sibling DNA Test is to establish the biological relationship between siblings. This may be needed for legal reasons (e.g., inheritance claims, child custody), immigration applications, or personal curiosity. The test provides conclusive evidence of whether individuals share the same biological parents, helping to resolve doubts and provide clarity.
How to Prepare
- Ensure all participants provide consent (for minors, consent from guardian is required)
- Do not eat, drink, or smoke for at least 30 minutes before buccal swab collection
- For blood samples, use EDTA tube and mix gently
- Label each sample with the participant's name and date of birth
- Samples should be sent to the laboratory within 48 hours if not collected at the lab
Doctor's Notes
Reviewed by Dr Pasupathy Arumugam — MBBS, MD (Pathology) · Reg. No. 21521
"Sibling DNA testing is a reliable method to establish biological relationships. It is important to choose a certified laboratory to ensure accurate and legally defensible results."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Unlabeled or mislabeled samples
- Hemolyzed blood samples
- Insufficient quantity of buccal cells
- Samples in improper containers
- Samples with visible contamination
Understanding Your Results
Probability > 99%
Extremely strong support for full sibling relationship
Probability 95-99%
Strong support for sibling relationship (may indicate half sibling)
Probability < 95%
Inconclusive or unlikely sibling relationship; further testing may be recommended
If you have questions about the results or need assistance understanding the implications, consult a genetic counselor or the referring physician.
Limitations
- ⚠Cannot distinguish between full and half siblings with 100% certainty in all cases; additional testing may be required
- ⚠Results are probabilistic, not absolute
- ⚠Testing of parents or other relatives may be needed for conclusive results in some cases
- ⚠Legal cases may require chain-of-custody documentation
Risks & Considerations
- ●No significant physical risks are associated with buccal swab or blood sample collection.
- ●Minor bruising or discomfort may occur at the blood draw site.
- ●Emotional stress may arise from the results; counseling is recommended.
Interfering Factors
- ●Contamination of samples if not collected properly
- ●Insufficient DNA quantity due to improper swab collection
- ●Recent blood transfusion (for blood samples)
- ●Bone marrow transplant (can affect DNA profile)
- ●Extremely degraded DNA samples
Compare With Similar Tests
| Test | Sibling DNA Test | Paternity DNA Test | Maternity DNA Test | Grandparent DNA Test | Avuncular DNA Test |
|---|---|---|---|---|---|
| Comparison | Sibling DNA Test |
Frequently Asked Questions
What is the cost of a Sibling DNA Test at DNA Labs India?
How is a Sibling DNA Test performed?
How long does it take to get results?
Is fasting required before the test?
Can the test be done for legal purposes?
What is the accuracy of the Sibling DNA Test?
What is the difference between full and half sibling DNA testing?
Can children be tested?
Is home sample collection available?
What documents are required?
How should I prepare for the test?
Are the results confidential?
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