Accredited USA Lab
Testing performed by a fully accredited laboratory in the United States.
Home Sibling DNA Test
Our Sibling DNA Test helps determine whether two individuals share one or both biological parents by comparing their DNA profiles. Testing can be performed using just the two siblings; however, including the mother and/or selecting 46-marker analysis can significantly improve statistical confidence. Because sibling DNA tests are more complex than paternity tests, analyzing a larger number of genetic markers can strengthen the statistical evaluation and help reduce inconclusive outcomes.
Accredited U.S. Laboratory – 34 and 46 Marker Analysis Options.
Our 34-marker Sibling DNA Test analyzes 24–34 carefully selected genetic markers, providing stronger statistical confidence when evaluating sibling relationships. Analyzing more markers increases the amount of genetic data available for comparison and may help reduce inconclusive outcomes.
This test is especially effective when the mother participates, as maternal DNA helps refine the analysis and improve statistical accuracy. However, testing can still be performed when only the two siblings are available.
All testing is performed in accredited U.S. laboratories, ensuring professional laboratory standards, secure sample handling, and strict confidentiality. PaternityUSA does not sell, share, or store DNA data in external databases, and results are typically available within 2–3 business days after the laboratory receives the samples.
Our 46-marker Sibling DNA Test analyzes a full 46 genetic markers, providing enhanced statistical confidence for sibling relationship testing. This option is particularly helpful when the mother is unavailable, where analyzing a larger number of markers can strengthen the DNA comparison.
By examining more than twice as many markers as many standard 20–22 marker tests, this advanced analysis provides additional genetic evidence and may help reduce inconclusive outcomes.
All samples are processed using validated laboratory methods in accredited U.S. facilities, ensuring professional laboratory standards, secure handling, and strict confidentiality. Your DNA is never sold, shared, or stored in external databases.
Results are typically available within 2–3 business days after the laboratory receives the samples, providing reliable answers with a fast turnaround.
Choose Test Kit Options
NEW YORK NOTICE: Due to NY state regulations, we cannot ship home testing kits to addresses within the state of New York. Please call 1-877-786-9543 for assistance.
25+ Years of Experience
Trusted by families nationwide for over two decades.
46 Marker Testing
Higher marker count for greater accuracy and confidence.
Fast & Private Results
Quick turnaround with complete confidentiality.
How Does Our Home Sibling DNA Test Compare?
The Home Sibling DNA Test helps determine the likelihood whether two individuals share the same biological father or are half siblings, using a simple and private at-home collection process. Samples are analyzed by a fully accredited USA laboratory using validated procedures to provide accurate, confidential results you can trust.
Two testing levels are available depending on your situation. The 24–34 marker standard test provides reliable results and is often appropriate when the mother is available to participate, as her DNA can be used to strengthen the comparison. For cases where the mother is not available—or when greater statistical confidence is desired—the 46-marker premium test analyzes nearly twice the genetic data used by many laboratories, which typically evaluate only 16–22 markers. This additional analysis helps improve the conclusiveness of sibling relationship testing.
Once all samples are received by the laboratory, results are typically available within 2–3 business days. For more than 25 years, families across the United States have trusted PaternityUSA for private, accurate DNA testing performed with professional laboratory standards and transparent pricing.
Our 34 Marker Test
$125
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24-34
Marker Count
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FREE
mom inclusion
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High
Conclusiveness
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FREE
2-Way Shipping
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Our 46 Marker Test
$175
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46
Marker Count
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Extra Fee
for mom inclusion
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Highest
Conclusiveness
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FREE
2-Way Shipping
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Typical Competitors
Up to $299
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16-22
Marker Count
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Extra Fee
for mom inclusion
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Variable
Conclusiveness
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Variable Pricing
on 2-Way Shipping
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A Simple, Straightforward Process To Our Home Sibling DNA Test
The at-home testing process is simple, private, and designed to deliver accurate results in just a few easy steps.
Buy DNA Kit NowOrder Your Test Kit
Place your order online, and your at-home DNA collection kit will be shipped quickly to your address.
Collect Your Samples
Use the included cheek swabs to collect DNA samples easily and painlessly following the step-by-step instructions.
Return the Kit
Place the samples in the provided packaging and send them back to the laboratory using the prepaid return mailer.
Receive Your Results
Once the lab receives your samples, analysis begins and your results are delivered securely by email within a few business days.
Answers to Common Home Sibling DNA Test Questions
Find clear answers to common questions about the testing process, shipping options, turnaround times, and how to achieve the most accurate and reliable results.
Our laboratory performs a high volume of relationship DNA testing, which allows us to offer competitive pricing while maintaining accredited laboratory standards. All tests are conducted using validated methods, including advanced marker analysis options, to ensure accurate and reliable results without compromising quality.
DNA collection kits are shipped free via trackable USPS delivery to addresses within the contiguous United States. Each kit includes a prepaid return envelope for sending samples back to the laboratory. Expedited shipping options are available during checkout for physical addresses within the contiguous U.S. If needed, participants may also choose the Collect & Send option and submit samples using their own swabs.
Results are typically available within 2–3 business days after the laboratory receives all samples. Orders placed before 12:00 PM (EST) Monday through Friday generally ship the same business day, helping reduce overall turnaround time.
Including the mother, when available, can significantly improve the conclusiveness of a sibling DNA test. Because each child inherits half of their DNA from their mother, her genetic contribution can be identified and excluded, allowing the laboratory to focus more directly on the paternal comparison. If the mother is not available, selecting the 46-marker testing option is recommended to provide greater statistical confidence. Testing can still be completed without the mother if necessary.
Many laboratories analyze only 16–22 genetic markers for relationship testing. PaternityUSA offers a 24–34 marker standard test and an advanced 46-marker premium option, which analyzes nearly twice the genetic data to provide stronger statistical confidence. The 24–34 marker test is often appropriate when the mother is available, while the 46-marker test is recommended when only the siblings are participating.
Sibling DNA testing can help determine whether two individuals share the same biological father (full siblings) or one parent (half siblings). If the maternal relationship is known, the test focuses on the paternal comparison. When parentage is uncertain, additional testing options may be available. This test is not designed to evaluate possible cousin relationships. If you are unsure which test is appropriate, our team can help you review your options.
Yes. If participants are located in different cities or states within the contiguous United States, additional shipping addresses can be added during the ordering process. Each participant will receive their own collection kit with a prepaid return mailer. All kits are linked to the same order using unique barcodes to ensure accurate processing. For shipments to Alaska, Hawaii, U.S. territories, or international locations, please contact our office to confirm availability and pricing.
Home Sibling DNA Test Reviews
For over 25 years, families across the United States have relied on our DNA testing for accurate results and dependable service.
“In my opinion I am very satisfied. I have an adult daughter that’s 24 years old now that I did not know I had. The results came in very quickly, took a couple of days, and I am very pleased with this product. If I need it again, this is what I’ll get. I will definitely recommend this to anybody that needs to do a DNA test.”
Private, Secure, and Confidential DNA Testing
Your Privacy is Protected at Every Step
Strict privacy controls are in place from DNA sample collection through result delivery. At PaternityUSA, your DNA and personal information are treated with strict confidentiality and are never sold, shared, or stored in external databases. We Value Your Privacy!
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