100% Accurate & Trusted Full Or Half sibling DNA Test Only $150

Buy Full Sibling Or Half Sibling DNA Test $155

Do You Need To know If You’re A Full Sibling, Half Sibling, Or Not Related?

Our premium Sibling DNA Test provides the most trusted & accurate results in USA!

What Is Sibling DNA Testing?

Sibling DNA testing, is often referred to as a paternity test without father, and can be used to prove or disprove paternity or maternity indirectly when the alleged father is unwilling or unavailable. The results will show if participants are full siblings (both parents in common), half siblings (one parent in common) or not related. This is accomplished by performing a DNA analysis & comparison between two or more alleged brothers and sisters.

Adding the known parent (usually the mother or mothers) to the test will help increase conclusiveness. 

Order Now Only $155


Why Buy Your Sibling DNA Test At PaternityUSA.com?

With so many entities on the Internet, which lab should you choose?  Over the years,  our lab has evolved to be the largest and most trusted DNA lab in the USA and worldBuy at PaternityUSA.com with confidence here’s why:


Most Trusted Lab In USA


Our DNA testing lab performs 3 of 4 sibling DNA tests in the US. Seen on TV shows like Maury®, Steve Wilkos® & Paternity Court®, Get Accurate Answers!

Most Trusted & Accurate Sibling DNA Test In USA



Our sibling testing lab is AABB accredited. Our sibling test analyzes upto 35 markers, uses the most advanced processes, and produces 100% accurate results you can always trust.

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AABB Accreditations



WE OFFER FREE OVERNIGHT delivery of sibling kits. And, sibling results are ready in 1-day. Some entities want you to prepare your own kits, but Don’t Risk Compromised DNA.

Order Today And
Receive Kit Tomorrow



We provide the most accurate sibling DNA test in the USA. Don’t risk false results buying from an entity that sends them to the lowest bidder for testing. Our lab performs all our own sibling tests for just $150.

The Only Thing Cheap About Our Sibling Tests Is The Price

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Full Siblings – Half Siblings – Not Biologically Related

Full sibling DNA testing assume there is one known parent in common and tests to see if both parents are shared.  The half sibling vs. unrelated DNA test assumes one parent is different and will determine if one parent is shared. If you are not sure whether the mother and or father are shared, performing both a full and half sibling test gives the most complete picture of the relationship.  The DNA test for both full and half siblings will let you know whether one, both or no parents are shared with the other tested individual(s). A sibling DNA test may provide the answers you seek.

How To Increase Conclusiveness & Speed Of Test Results? We Offer 1-Day Service.

Generally, a sibling test can be performed with only two or more siblings, however adding any known parent(s) to the test is recommended to increase conclusiveness.

Each individual is passed half of their genes from the mother and half from the father. When the known mother(s) take part in the test, the mother’s genetic profile is compared against her child. Then, all of the DNA inherited from the mother is eliminated, therefore isolating the genetic profile from the father. With the paternal profile positively identified, it will more precisely match (or not match) the other alleged sibling’s paternal profile resulting in a more precise and conclusive test result. You can one mom AT NO CHARGE when you choose the option for 1-day processing of samples.

Furthermore, if no known parent(s) can be added to the analysis, we recommend you consider the option for analyzing additional markers as needed (UP TO 35 markers) to ensure you get the most conclusive result possible based on the samples that are available.

Options and Pricing


Need To Collect Samples Fast? We UPS Overnight A Sterile Kit For Free!

Our sibling DNA packages come complete with a sterile collection kit, DNA analysis, and 100% accurate test results.  We ship all collection kit(s) via FREE UPS OVERNIGHT at no additional charge to any physical address within the contiguous USA.  You also have other shipping options available for additional delivery addresses or  delivery addresses outside contiguous USA.

If you need to collect the sibling’s samples same-day, and cannot wait  overnight, then you can use your own Q-Tip swabs on hand. In these cases, we will provide you with easy to follow  instructions to do so. It’s always best to use the lab’s sterile swabs to avoid accidental DNA contamination.

What if Participants Are In Different Cities Or States?

It is common for the participants to live too far apart, to get together, and do sample collection.  For these cases, we offer an option for multiple shipping addresses.  When ordering, simply provide the additional address, and we will send the other participant a collection kit via overnight UPS. The sibling’s DNA samples are then linked through reference numbers and bar codes when they arrive back in lab.

Order Now Only $155


What If The Siblings Are Both Male? – Consider Y-STR Analysis

If two males would like to establish whether or not they are related on the paternal (father’s) side, a Y-STR test is a good option to consider. The Y-STR test compares the Y-Chromosome every father passes to his child.  This Y-STR is very unique, similar to a fingerprint. When the  Y-STRs of the males are compared, the result will be a precise a “Yes” or “No” answer to the question of whether or not the two males come from the same paternal line.

Likewise, an mtDNA female lineage analysis provides a conclusive answer regarding a relationship on the maternal side.

In addition, there may be other more conclusive options based on who is available to test.  Notably, grandparent DNA testing for an alleged grandparent and grandchild, or an avuncular aunt/uncle DNA test with a full brother-sister of the alleged parent. You may also consider a family reconstruction analysis if more than one paternal relative is available to participate.

Order Now Only $155


Shipping – Sample Collection – Test Process – Results Reporting

Free Overnight Of Sterile Kit – We ship our collection kits with FREE UPS overnight delivery Monday through Friday to physical addresses in the contiguous USA. Orders received and processed by 2:00 PM EST are shipped the same business day.  Orders received after that time will ship the following business day.

The DNA sample collection process is very simple. Sampling is done through a cheek swab, which is also called a buccal, swab. The swab, similar to a large Q-tip, is painlessly rubbed against the inside of the cheek to collect skin cells from the inside of the mouth. All tests are performed twice. For that reason, there will be 4 buccal swabs per person in your collection kit. Do two swabs on each side of the mouth. For best results, rinse the mouth with water prior to swabbing; also refrain from smoking or drinking coffee or tea for 2-3 hours before the DNA collection.

When all samples are in the lab, you will be notified via email that testing has begun. This type of analysis completes within 3-5 business days after samples are in lab.

Results are emailed to the email address on your account. When hard copy results are ordered, they are mailed to the billing address unless otherwise noted.

Options and Pricing


Need A Legal Or Immigration DNA Test?

Sibling DNA testing can provide definitive answers regarding if the tested participants are truly biological brother and sister. When you need your results for a court of law or other agency for any legal proceedings, then purchase our AABB accredited legal test. Our legal tests are admissible court approved evidence in cases for child support, visitation rights, to change name on the birth certificate, estate, wills, probate situations, and/or any other type case where proving the relationship through an AABB accredited DNA test is required.

If you need results for immigration, CRBA or passport, the embassy, USCIS/ICE or Dept. Of Homeland Security may require AABB accredited DNA evidence of the biological relationship. If so, then order our AABB accredited immigration analysis.

Other Types Of Genetic Samples

In a sibling DNA test, the most common method of DNA collection is through a cheek swab. However, we understand there are times when a test participant is unable to submit a swab, such as may be the case where a family member may be deceased, incarcerated or otherwise unavailable. For these reasons, we offer forensic processing services for other types of DNA samples. Ear wax, hair (must have the root ball attached), mucous on a tissue, finger or toe nail clippings, and toothbrushes are common forensic samples. Additionally, in certain cases tissue or blood samples may be available from a medical examiner or coroner’s office. Forensic sampling prices apply for non-standard samples. For pricing and more details on this process, please contact a DNA Case Manager.

Order Non-Legal Sibling $155 Order Legal Sibling $255

Answers To Common DNA Questions:
Click On Question For The Answer


Sibling DNA testing analyzes the probability of rather  alleged brothers & sisters share one or two parents in common. This will conclusively determine if they are full or half sibling to thus proving or disproving paternity.

Yes, in-fact unless the tested siblings are identical twins all siblings have unique DNA profiles.  We get 50% of our DNA from our biological father and 50% from our mother.  All brothers and sisters are made up of a unique blend of those DNA profiles received by both parents.

Identical Twin share 100% of the genes
Full Siblings share 50% of the genes
Half Siblings share 25% of the genes
1st Cousins share 12.5 % of the genes

In a full siblings test it is assumed that the tested brother & sisters share the same mother, but need to confirm that they also share the same father. Whereas, in a half sibling test it is known that the tested brother & sister DO NOT share the same mother, but want to verify that they do share the same father. When the status of the known parent is unknown such in the case of an adoption, we can perform both a full sibling and a half sibling test.

When two people have related mothers and want to see if they have the same father, or believe their fathers could be related, a sibling DNA test may not produce the most accurate result if there is a cousin relationship in the case. In this testing scenario, a paternity or maternity test with the parent in question would be the best solution. Other testing options may be a male lineage Y-STR males, or an X-SV female lineage to look for a common female line. Please call us at toll free (877) 786-9543, and a case manager can help guide you to the best test for the most accurate result.

The avuncular test will only produce an accurate result report with an aunt or uncle who is a full sibling to the alleged father, meaning they share the same mother and father. If a grandparent or other relative is available, testing with them instead may be a better option. Please contact a case manager at (877) 786-9543 for more information.

In a matter as important as DNA testing, especially for court-admissible cases, it is never good to leave room for doubt. Ideally, if you are having a sibling DNA test, the known parent(s), usually the mother or mothers, should be tested. A child receives half of their DNA from their mother, and the other half from their father. Having the mother in the test allows us to eliminate the maternal DNA, or DNA from the mother. The remaining unmatched DNA will then be known to be that of the biological father. In so doing, the test will produce a more precise result. In general, if the mother is available for testing she should be included. In any event, the sibling test can still be performed without the inclusion of the mother if she is not available. IF THE MOTHER(S) IS NOT AVAILABLE, YOU MAY CONSIDER RUNNING THE EXTRA MARKERS.

YES! Our mission is to provide the most reliable & most accurate results as quickly as possible. When the mother is included in a sibling test with expedited 1-day processing, results are ready in 1 business day after all samples are received in lab. When you choose 1-day rush processing, it is FREE to add one mother to the test! If no mother is participating in the test, our standard test processing time is about 3 business days, and is still a fast option.

We understand that speed is often a very important factor.  Also, we value our clients very much, and know how easy DNA cross contamination can occur when using an open air q-tip.  Therefore, we to try to not have you make your own collection kit.

For this reason, PaternityUSA  will deliver a medically sealed sterile kit to you via FREE overnight UPS shipping.

Sometimes the situation dictates that you have to do a DNA collection right away or lose the opportunity to obtain a sample from that person. In such cases, you can use regular cotton swabs for a DNA collection. Please note that this is not the recommended procedure, and should only be used in circumstances where you may not be able to swab at another time.

Visit these sites for valuable sibling resources:

Sibling Resources
Sibling Support Matters!

Sibling Support Project
Sibling Workshops

SHARC Sibling Support
Sibling Drug Abuse Help

Immigration Test

Thank you for your immediate and prompt service...Highly recommendable for people seeking DNA Testings...Good job Paternity USA...Again thank you so much. Another VERY HAPPY customer 🙂

G.B. - Immigration Client

Steve S

We just did a paternity test and used our doctor as the collector - the process was easy, legitimate and cheap! I highly recommend for those of us on a budget!

Steve S

Eric M

Awesome. Easy. Best Price Around! Got my son's birth certificate right now. Thank you all!

Eric M


I purchased this Y-STR test to verify that my son is the father of my grandson. Now I know for sure this sweet little boy is my son's baby. Thanks Paternity USA for the peace of mind.



I took this test last month and my results were accurate. Easy process, good customer service and i like that they notified me of the status of my case all along the way. I always wondered and now I finally know for sure. I highly recommend you all every chance I get. Lisa L

Lisa Lockhart


I picked paternity usa for my immigration test for my mother and sisters. I'm so glad I did. Everything great - very good service and fast.

T. Nguyen


I don't usually write reviews, but I feel like this one is important. To have a lingering question of whether you belong in a family or not isn't anything easy to deal with. I wondered at first, because they are cheaper than everyone else, and felt like this is an area I shouldn't skimp on, but I'm so glad I picked these guys. I didn't skimp - I just found the best deal! My test result was very definitive and left no room for question. I want to let others know that you can find your answer and peace. Pick Paternity USA, they will do a great job. I can't say enough good about them. Thanks - Brenda

Brenda Leighton

J Luna

I am glad I chose this company for my paternity test. They scheduled an appointment for me and my daughter, it was within a couple of days, then the results were emailed to me less than a week later. I didn't have to do anything but show up for the appointment - they handled everything else from beginning to end.

J Luna


Thank you guys for a process that is easy and quick. You've been so helpful! Jenn



I was given up for adoption and found a sibling through online records. We did the mtDNA test to see if we have the same mother (who is deceased), and I finally have been able to connect with my family. Even though I will always be thankful to my adoptive family, it's nice to add to that! Test was conclusive, process easy and good communication. Thanks 🙂

mtDNA Tester

Immigration DNA Testing

The immigration process is a hard process for me and my family and PaternityUSA has experience and was able to help us through the whole thing. Happy with your service and I will let my friends know. Sincere thanks - the Claitte Family

The Claitte Family


I called PaternityUSA to help us with getting my children in from Jamaica, and so they performed the AABB accredited DNA test for immigration. The process only took (2) weeks, and everything was very smooth. I cannot thank these people enough.


Peter Johnson

I had bought a DNA kit at CVS pharmacy, but I wanted to see if I was the grandparent. I discovered that I could not use the drug store kit for a grandparent DNA test. I called paternityusa, and I'm very pleased with the work they performed. They really took the time to talk to me

Pam Johnson

Rick Davis

I found my long lost brother after 40 years separation at birth. We did a y-str test, and it was very accurate. I happy to have my brother in my life again

Rick Davis

Sally Valega

This company did a wonderful job for our family, and we're so grateful we were able to find them on the internet. THANKS!!

Sally Valega

Ordering Easy As 1 2 3


Choose the type of relationship that you need DNA answers for, and who is available to do the testing.


Decide if you need answers for just personal knowledge or if you need answers for court or other legal matter.


Place order online on our secure shopping cart with credit card or PayPal. DNA test kit is delivered overnight.

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