Full Sibling Or Half Sibling DNA Test $135

Our Sibling DNA Test Can Determine If You’re Full Siblings, Half Siblings, Or Not Related!

Affordable premium DNA tests (Up To 35 Markers) from the most accurate & trusted USA lab.

What Is A Sibling DNA Test?

A sibling DNA test analyzes the DNA of alleged brothers or sisters to determine if full siblings, half siblings or not related. The results can help prove or disprove the paternity or maternity  indirectly when the alleged father or mother is unwilling or unavailable to be tested. Our DNA tests for siblings can analyze Up To 35 Markers, which is almost 50% more markers than our competitor’s 24 marker test. 

Furthermore, our sibling tests are a perfect solution to confirm or deny Ancestry.com ®, 23andMe.com ®, or MyHeritage.com’s ® genealogy test results. These heritage & ancestry kits only indicate that you may have found a lost sibling, but most importantly we can prove or disprove the findings. 

Our results will show if the participants are full siblings (both parents in common), half siblings (one parent in common) or not related as brother and sister. This is accomplished by actually comparing one person against another, and not just by using an ancestry database data.

Very Affordable Sibling Tests – FREE 2-WAY RUSHED SHIPPING Fast, Accurate, Reliable Results

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4 Reasons To Buy Your DNA Test At PaternityUSA.com

AS SEEN ON TV, our lab is the largest, most reputable, and most trusted lab in the USA. Rest assured you can buy at PaternityUSA.com with confidence. Here’s why:


Our laboratory performs 3 of 4 private sibling DNA tests in the USA. AS SEEN ON TV shows like Maury®, Steve Wilkos® & Paternity Court®. Our full and half sibling DNA tests provides the 100% accurate answers you can trust to be real!

Most Trusted & Accurate DNA Tests


Our  laboratory is fully accredited, analyzes more markers (Up To 35 Markers), and utilizes only the most advanced testing methods. Our sibling DNA test produces fully accredited results for legal or USCIS immigration matters.

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Lab Accreditations


FREE USPS RUSH DELIVERY of collection kits with FREE rush return delivery. And, paternity test results can be ready in 1-day. Some entities want you to prepare your own kits, but Don’t Risk Compromised Samples.

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Determine The Truth


We provide only high quality premium tests at very affordable prices. Don’t risk false or inconclusive results by buying from small and unproven laboratories. Our lab performs all our own sibling tests in-house.

The Only Thing Cheap About Our Sibling DNA Test Is The Price

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Full Siblings – Half Siblings – Not Sure If Related

Full sibling assumes there is one known parent in common and analyses to conclusively determine if both parents are shared.

Half sibling assumes one parent is different and will determine if one or no parent is shared. If you are not sure whether the mother and or father are shared, performing both a full and half sibling analysis gives the most complete picture of the relationship.

A 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 accurate is DNA testing for siblings?

A Sibling DNA test is 100% accurate and can produce very conclusive results.  Generally,  the analysis can be performed with only two or more siblings, however we recommend adding any available known parent(s) to help increase conclusiveness.  Please feel free to call us at (877) 786-9543 for consultation.

If no known parent(s) can be added to the analysis, you may consider the option to analyze additional markers(Up To 35) to ensure you get the most conclusive answer possible.

Options and Pricing

The Process Is Easy:

Upon receipt of order, we will rush you a FREE sterile DNA collection kit

Sample Collection:
Sampling is done through a cheek swab.

Sample Analysis:
When  samples arrive at lab, you will be notified via email.

Results Reporting:
Results are emailed and/or mailed to the address on file.

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Can you also test other family members?

YES! A grandparent DNA test can be performed with an alleged grandparent(s) and grandchild.  An avuncular DNA  test  is performed with a full sibling of the alleged parent (Aunt/Uncle). Lastly, you may also perform a family reconstruction test if multiple paternal relative are available.

Can you test types of genetic samples?

YES, ear wax, finger or toe nail clippings, hair (w/ root ball), mucous on a tissue, and toothbrushes are common forensic samples. For more information & pricing please call us at toll free (877) 786-9543.

Non-Legal Legal


YES, a sibling DNA test can conclusively determine you’re full or half siblings thus proving or disproving paternity.

No, in-fact unless the individuals are identical twins all siblings have unique genetic profiles.  The combination of genetic markers inherited from both parents makes every sibling unique.

If the siblings are males, a Y-STR analysis is a good option to consider. The Y-STR male line anakysis compares the unique Y-Chromosome (Like A Fingerprint) every father passes to his male child. A Y-STR analysis will always produce a conclusive “Yes” or “No” as to whether or not the alleged male siblings come from the same male line.

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

When someone wants to see if they are siblings or cousins, sibling DNA testing may not produce the most conclusive result. Therefore, we recommend a paternity or maternity analysis with the parent in question as the best solution.  Call us at (877) 786-9543, and we can help guide you to the best DNA test.

YES! However, our mission is to first provide the most reliable & accurate results at the cheapest prices, and as quickly as possible.

Some promise one day results, but in reading the fine print, their disclaimer says it can take 3-5 days.

Having said that, we do offer a 1-day processing option if at least 1 mom is included in the test. (Please call to request 1-day service option)

Sometimes you have to do the DNA collection right away or lose the opportunity to obtain a sample. In such cases, you can use regular Q-tips  for the collection, however this is not ideal. For this reason, PaternityUSA will rush a medically sealed sterile kit to you FREE.

YES,  commonly used forensic DNA samples include ear wax, hair (must have the root ball attached), mucous on a tissue, finger or toe nail clippings, and toothbrushes. Please contact us at (877) 786-9543 for more info.

Orders before 2:00 PM EST, will be rushed a sterile kit via traceable USPS for FREE Monday through Friday to physical addresses in the contiguous USA. Orders received after t2:00 PM EST ship the following business day.

If siblings are in different cities or states, when ordering, simply provide the additional address, and we will send the other participant a separate collection kit. The reference numbers and bar codes link the samples when received in lab.

YES, our legal sibling packages  are valid 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 is required.

Further, if you need the results for immigration, CRBA, passport, the embassy, USCIS/ICE or Dept. Of Homeland Security as evidence of the biological relationship, then order the immigration package.

We Look Forward To Serving You!

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.

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