Sequencing results

What do all these numbers mean on my DNA Test results?

When you look at a report for DNA Testing there are always a lot of numbers.  These numbers throughout the report indicate several things, and it can be overwhelming to figure out which ones are important.  As far as understanding your results only two of these numbers will really help you understand the result of your test.

First is the percentage listed as the ‘Probability of Paternity.’  This percentage is generally one of two numbers in a DNA Paternity Test 0% and 99% or higher.  This number is probably the most helpful when trying to interpret your DNA Testing results.

In other tests like Siblingship or Avuncular DNA Tests you will not have a percentage in your results.  Here the conclusion is based upon an index number which is calculated based on the DNA markers shared by the individuals being tested.  This number in this type of testing is anywhere between 0 and basically infinity. When the number is between 0 and 1 it is considered more likely that two people are unrelated.  If it is between 1 and 75 the relationship is considered to be favored but still the result is considered inconclusive.  If above 75 it is more likely that the individuals are related than not.  In this type of testing a result is rarely considered fully conclusive.

In a DNA Paternity Test or a Grandparent DNA test with both grandparents you will also have an index number.  This number is generally either 0 or 150 and above.  If this number is 0 it is considered an exclusion (or not the father).  If the number is above 150 it means that the alleged father is that many times more likely to be the alleged father than an untested, unrelated, man of the same ethnicity.

At Identigene we know that the reports can be a little difficult to read, so we hope that our explanation has shed a little light on the matter, if not please contact us at 1-888-404-4363 and we would be happy to answer any unanswered questions.

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  1. I received my results and it said 0% but I’m wondering what all the numbers mean and if smoking before the test was done could cause this

    • Hi Roxanne,
      A 0% means there was no relationship found between the DNA samples our lab received. There are numbers on your results letting you know the probability of relation within a population called the Combined Relationship Index. This number is stating the same 0% probability.

      We do recommend no smoking, eating or drinking an hour before collections are done in order to avoid possible contamination. However, our lab does test for contamination. If it is found, we will ask for a recollection to obtain clean samples for testing. When you receive conclusive results (a percentage of 0% or over 99%) this means no contamination was found and testing continued with clean samples. I hope this information helps. If you have more questions or concerns about your results, please call us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for you comment!

  2. My dad was killed when I was very small. I am now in my 40′s and my mother has maintained that this was my father through out my life with absolutely no reason to lie. My son looks almost identical to this man and his buddies maintain that I am his child also, as well as my son having the same rare blood disorder as one of his sisters. I know blood type doesn’t mean much now a days but my mom is o- and this man ( according to his records has a+ ..I also have a+. We did a avuncular test with his sister and it said we were not related. My mother is 100% positive he is my father. My mother has absolutely nothing to gain by lying and would not have agreed to do the test if she wasn’t 100% positive. Could you please tell me how something like this could happen? I’m really very confused and feel there is something strange going on. Once again, my mother would state her life on it and considering the EXTREME resemblance I believe her and his buddies. Could there be another explanation besides he’s simply not my father?

    • Hi Tina,
      Thank you for your patience! I am understanding you tested with IDENTINGENE? We have a highly accredited lab with strict guidelines and procedures in order to reach 100% accurate results. Were you there to witness the collections for all participants testing and providing samples? It is important to witness all the collection samples to ensure the lab receives the correct samples. We trust our customer to send in the samples they want tested. Was is just you and your alleged aunt? It is important that your biological mother tests too as well as any other first-degree relatives to your alleged father. Including the mother will decrease the chances of a result being inconclusive. Without any case verification, I cannot release any more details about your case. Please call us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET for more case specific information. We are more than happy to help you understand the results and testing process. Thank you for your comment!

  3. So I have a question that needs answered. I had a DNA test done by child support, and the results were negative. I don’t understand considering I never slept with anyone else. I’m having a hard time reading the allele results.
    D3S1358 c(15,18)af(17,18) D7S820 c(10,11)af(9,11) vWA c(15,16)af(17) FGA c(21,24)af(23,27) D8S1179 c(14,15)af(12,14) D21S11 c(30,31)af(28,30) D18S51 c(16,17)af(13,16) D5S818 c(11,12)af(8,11) D13S317 c(11,14)af(10,12) D16S539 c(9,13)af(11,13) TH01 c(6,9)af(7) TPOX c(8,11)af(8,10) CSF1PO c(10,11)af(10,12) Penta D c(10,11)af(2.2,13) F13A01 c(3.2,7)af(5,7) F13B c(8)af(6) LPL c(7,10)af(10,11) Penta E c(7,8)af(8,12) FESFPS c(10,11)af(9,12) Penta C c(7,13)af(11).
    I really need help.

    • Hi Mel,
      Did you test through IDENTIGENE? If not, we cannot comment on behalf of another lab and their processes or results. You can always call them and have them explain or read the results to you. We can let you know more about the services IDENTIGENE has to offer. We offer both an at-home paternity test ($129 lab fee) and a court-admissible test ($329 lab fee, results will uphold in court). The at-home test can be done in the privacy of your own home, but know that mistakes can be made both intentionally and unintentionally. We cannot verify that a sample labeled “John Doe” is in fact from John Doe. We trust our customer to provide the sample they wish to test. With a court-admissible test, your privacy will still be kept, however a disinterested third party will collect and witness the samples to make sure there is no room for dishonesty during collection. If you would like your results explained, please call us if you did it through IDENTIGENE, or contact the lab which did the testing. To order one of our tests, please call us or visit your local Walmart, RiteAid or CVS. You can reach us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for your comment!

  4. I am reading the results of my boyfriends test and most of his numbers and his sons numbers are close in range if not the same. For example “father 11, 13 son 10, 13″ “son 17 father 17, 24″ “son 14, 19 father 14, 19″ (Similar pattern is repeated for all areas) All the numbers are with in one number of each other with a same number, or both numbers exactly match. I just don’t understand how both of the child’s numbers and both of the fathers numbers are exact or within one number of being exact if one number is given to the child by each parent. I have reviewed a few other examples online and the majority of them have only one of two numbers matching with the other numbers nowhere in range of each other. Please help me understand how the numbers are so close or exact on every “Genetic System” tested?

    • Hi Jane,
      We are given one allele from our mother and the other from our father within each pair. For a child and an alleged father to have a confirmed relationship, all markers must have a match. With DNA testing “close or one or two numbers off” does not exist. We are either given a certain marker or it is not the same. Have in mind, with DNA testing, the mother’s DNA has to be considered as well. If testing has confirmed a relationship between the alleged father and son, all genetic markers have a match. When there are three or more mismatches, the relationship is an exclusion. An exclusion means, the DNA was not supporting a relationship between the participants.

      Let me explain the numbers you mentioned above:
      Father: 11,13
      Son 10,13
      This means the child most likely gained a 13 from the father, meaning the marker 10 must come from the mother. (DNA testing is more extensive than looking at these numbers, but it can give us a visual on how it works)

      Father: 17,24
      Son: 17 (this is another way to write 17,17,)
      This means the child gained a “17″ from each parent.

      I hope this information helps. If you would like us to explain your case or results in more detail, please call us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for your comment!

  5. Hello,
    When testing 2 siblings (father deceased) and they need to test more markers, does this mean the test is leaning towards unrelated?

    • Hi Brooke,
      Not necessarily. IDENTIGENE does not release any results before testing is all the way completed. Knowing the outcome of a test is not possible until ALL testing is done and all DNA has been provided. Did the biological mother test or any other first-degree relatives to the alleged father? If not, this may be why the lab is in need to test more markers. The DNA provided may not have been sufficient to obtain a conclusive result, therefor the test is leaning toward an inconclusive if more markers cannot be tested or more participants included. If you have more questions about the specifics of your case, please don’t hesitate to call us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for your question!

  6. Hi my friend took a paternity test and it came back 75% I think he should take it again. What do you think?

    • Hi Angie,
      Any percentage above 0% or under 99% is considered to be an inconclusive result. Taking the test again with the same participants, won’t necessarily change the outcome. Did the mother test with the alleged father and child? If not, you may consider adding the biological mother to the test. Children get half of their DNA from mom and the other half from dad, including the mother will help decrease the chances of the results being inconclusive. You can also have your friend call our client support so we can look into the details of her case and better assist her situation. I hope this information helps. We can be reached at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for your comment!

  7. I took a DNA test of my daughter, and her grandmother that returned inconclusive, but 29% matched. Her father is decease, and the only other possibility was a 0% match. What do I do for additional testing? Blood vs. Swab? See if I can obtain anything from the medical examiners? I need help, as this is such an overwhelming experience, and I don’t know who to confer with.

    • Hi Diane,
      Thank you for your patience! We at IDENTIGENE, are more than happy to assist you through what we know is a life changing process. Typically when a test result is inconclusive, (any percentage above 0% and under 99%), it means there was not enough DNA to obtain a concrete result. Was the grandmother and the child the only two participants? If so, it would definitely help to have the biological mother test along with them, as well as any other known relatives to the alleged father such as siblings or any known children.

      Blood DNA test will not make a difference when additional testing is needed. DNA will be the same whether it is blood or cheek swabs and will yield the same results and one is not more accurate than the other. What we recommend is calling our client support they can discuss your case in detail. We may ask if there are any other known relatives (alleged father’s dad, brothers. sisters, children) to the alleged father willing to test. With a grandparent test, up to 5 participants can send in their DNA samples for the same price of $399. I hope this information helps. If you have any more questions or concerns, please call us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for your comment!

  8. How accurate/conclusive are the avuncular tests? Can I trust the results? Or will there always be a question of how conclusive it is?

    • Hi Laura,
      Thank you for patience! IDENTIGENE will always provide 100% accurate results based on the samples provided, meaning results can be trusted. Also have in mind, when testing from at-home, the integrity of the participants is crucial. This means making sure the samples labeled “John Doe” really were collected from John Doe. When our lab receives samples, results will be based off the DNA provided in the envelopes. With relationship testing, there is less of a chance of an inconclusive result if more people participate and the more relatives, the more DNA can help and be used in testing for a concrete result. I hope this information helps in answering your question. If you continue to have more questions o concerns, please call us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for your comment!

  9. How many alleles have to match in order to be nephew and uncle?

    • Hi Sue,
      Did you take the Avuncular DNA Test? If not, we recommend you take this test in order to determine a relationship for a nephew/uncle.
      Our lab looks at more than just alleles matching, and for this reason it is important to be doing the correct test. An avuncular test is more extensive than a paternity test which is why the price for it is $399 and has a testing time frame of 5 full business days. You can also add another participant to paternity tests 30 days after the first test for an additional $89. I hope this information is helpful. If you have any more questions, please call us at 1-888-404-GENE, Monday-Friday 9AM-6PM ET. Thank you for your comment!

  10. Hi,
    I had paternity test done with identigene. One of the markers didnt match the father but he’s not excluded as the father. Says 99.99% he is. In your earlier answers you said only if all matched a father not excludrd? I asked about further testing but was told its not needed.

    • Hi Lisa,
      Thank you for your question. To rule out a person as the alleged father, there would have to be 3 markers that are not matching to rule it as an exclusion. Was the mother included in testing? Typically, including the mother will strengthen the result of the test, however, the result you have received is the highest possible in a DNA test.
      If you would like more help understanding your results or reading them, please call our friendly client support at 1-888-404-GENE, Monday-Friday 9AM-8PM ET, or see the link below for further help. Thank you for your comment!

      http://www.dnatesting.com/dna-paternity-test/paternity-testing-process/paternity-test-results

  11. I took a paternity test to clear my name, mentioned to the prosecutor and lab tech obtaining sample that i never slept with the women but my full blood brother has & believes it is his…brother WILL not go into take the test & ignored a court order to do so…in the meantime ive been given a % of paternity of 99.999998 & report states testing was based on comparing that of a random unrelated man against my dna..im losing my wife & everything i own over this…the test was court ordered & the court date is coming up to legally name me the father..can i have the courtd have the test re-ran with the information that there is a blood brother who has admitted he is the dad but wont comply to tske the test? Never slept with female & was being alledged the father by mother..but the alledged fathers brother had sex multiple times with the mother.

    • Hi Shane,
      Thank you for your patience. IDENTIGENE DNA test results are 100% accurate are based on the DNA that is provided to our lab. Siblings still have significantly different DNA from each other unless they are identical twins. To our knowledge, courts will go by the results of the DNA test, but you may contact your prosecutor for more details. Did you inform our lab there is another alleged father and you are siblings? This piece of information may be helpful to our lab while testing. Another recommendation is to have the biological mother tested as well, i not already included. If you would like to ask more specific questions on your case, please call our client support. You can reach us at 1-888-404-GENE, Monday-Friday 9AM-8PM ET. We are more than happy to assist you! Thank you for your comment!

  12. Why are there some numbers missing in te alles list…
    The markers have 2 numbers for the cild and one for alleged father and visa versa on 2 of the markers?>..and then that makes it a zero match…

    if the number was present the match might be there and the 9 out of 15 result could potentially become 11 /15 matches…still not 100% but higher and mutations might be the issue…

    so, why the missing numbers…it was a father and daughter test..no moth involved and mother swears its only 2 men…one of which had 4/15

    • Hi Geoff,
      Great question! Instead of writing markers, “12,12″ the report will just mark it as one “12″ because the allele received from the mother and father was a 12. That does not mean a marker is missing. When it reads, for example, “13, 9″ then one parent gave the child a “13″ and the other gave a “9.” In order to be considered a match, ALL 15 markers have to match. Since humans share 99% of the DNA, it is common to see some matches among the DNA report, it is the uniqueness of all 15 markers matching that will establish a relationship. I hope this information helps. If you have any more questions, please call our friendly client support at 1-888-404-GENE, Monday-Friday 9AM-8PM ET. Thank you for your comment!

  13. I was wondering if this.is a definite “can not be the father”, or inconclusive.
    Child father
    12,13 – nil
    31,32.2 30,32
    10,11 8,11 11
    10,13 11,12
    17,18 17,18 17,18
    7,9.3 6, 9.3 9.3
    9,12 11,11
    10,11 9,11 11
    17,24 17,19 17
    15,16.2 14,15 15
    8,8 8,9 8
    14,18 12,13
    11,12 11,13 11

    • Hi Mizz,
      Thank you for your question! Was there a conclusion statement on your results form?
      If it reads: is excluded as the biological, the Combined Parentage Index (CPI) is 0 and has a 0% of probability, this means that he cannot be the father because the analysis shows that they do not share a paternity relationship.

      Or if it reads: is not excluded as the biological father, the Combined Parentage Index (CPI) would be 100 or higher and is greater than 99%, this means that he is considered to be the father because the analysis shows that they share a paternity relationship.

      Typically, when results are inconclusive, our lab would come in contact with you to obtain the needed DNA to reach a conclusive result.
      I hope this information is helpful. If you have any more case specific questions, please call our customer support. You can reach us at 1-888-404-GENE, Monday-Friday 9AM-8PM ET. We are more than happy to assist you! Thank you for your comment!

  14. I just received a call for my prenatal test results the father matches 10 of 14 marker but there are 2 other possibilities it said he was the father but he was the only one to use protection. Is he the father?

    • Hi Af,
      Thank you for your patience! IDENTIGENE will not exclude, (consider him to be the father), an alleged father from paternity only when there is a match on ALL the markers. If you had any other potential fathers you may want to consider testing them as well, especially if they are related. If you have any more questions on your results or testing in general, please feel free to contact our friendly client support. You can reach us at 1-888-404-GENE, Monday-Friday 9AM-8PM ET. We would be more than happy to discuss the details of your case! Thank you for your comment!

  15. George Jordan Christ

    my 1364 part of my DNA is changed . ?hat this means /

    • Hi George,
      I’m having some trouble understanding your question. You are more than welcome to give us a call at 1-888-404-GENE, Monday – Friday 9AM-8PM ET. We would be more than happy to assist you! Thank you.

  16. my husband tested for a grandchild relationship, the results came back saying that the child is related 97.3% to the grandmother and 3% related to him, does it mean that his is not relate to the child, that the father is not my husbands son?

    • Hi Lara,
      Great questions! Did your husband test with IDENTIGENE? If so, any results that are above a 0% and under a 99% are considered to be inconclusive, meaning that no concrete answer of a yes (not excluded) or a no (excluded) was reached. Typically, inconclusive results may occur when the child’s biological mother did not test. Was the child’s biological mother included in the test? The grandparent test through IDENTIGENE allows up to 5 participants, including the child, to be added to the test for the same price of $399. If you continue to have any questions regarding your results or the test type, please give our friendly client support a call. They would be happy to discuss the details of your case and see what else can be done to answer your questions. You can reach us at 1-888-404-GENE, Monday – Friday 9AM-8PM ET. Thank you for your comment!

  17. I am trying to figure out whether this is possibly my husband’s 1/2 sister – we think so, but with a 13%, I’m not sure if that makes the likelihood low. Any thoughts you can give me would be greatly appreciated! Thank you!
    DNA Locus Putative Sibling 1 Putative Sibling 2 Sibling Index (Full) Sibling Index (Half) D8S1179 12,13 11,14 0.25 0.50 D21S11 28,31 28,30 1.03 1.28 D7S820 10,11 11 1.46 1.71 CSF1PO 11,12 11,12 2.12 1.25 D3S1358 14,15 15,16 0.70 0.95 TH01 6,7 7,9 0.89 1.14 D13S317 11 8,11 1.01 1.26 D16S539 8,14 9,12 0.25 0.50 D2S1338 20,23 17,20 1.04 1.29 D19S433 13,14 14,16 0.59 0.84 vWA 15,18 16,17 0.25 0.50 TPOX 8,11 10,11 0.74 0.99 D18S51 12,19 14,15 0.25 0.50 D5S818 11,12 12 0.89 1.14 FGA 24,25 21,22 0.25 0.50
    COMBINED SIBSHIP INDEX (FULL-SIBLING): 0.00084, PROBABILITY:0.08% COMBINED SIBSHIP INDEX (HALF-SIBLING)1.15, PROBABILITY: 13%

    • Hi Shelly,
      Anything above 0% and below 99% is considered to be INCONCLUSIVE, meaning no concrete answer can be reached. This commonly happens because there were not sufficient participants to determine a solid probability of relationship. Did your husband include his biological mother in the test or any other participants to test along with him and his alleged half-sibling?

      Including the mother (or first degree relatives to the alleged father) provides more DNA information to rule for or against paternity, this is because half of the child inherits the mother’s DNA. If we can isolate or locate what part of the DNA came from the mother, it is then easier for us to determine if the siblings’ DNA matches.

      IDENTIGENE offers the half vs. full sibling test and for the price of $399 it does include up to 5 participants total. I would ask if you tested with their biological mothers or included any additional participants to help with testing.

      Please feel free to contact us if you have other questions or concerns that we can help you with, we are here to help. We can be reached by phone at 1-888-404-GENE Monday- Friday 9 a.m.- 8 p.m. ET.

  18. mother child father index
    15,16 15,16 16 1.98
    16,18 14,16 14,18 4.95
    17,23 17,23 17,21 1.76
    11,13 12,13 10,12 3.52
    29,30 30,33.2 31,33.2 18.52
    13,16 16,18 18,22 4.24
    14 13,14 13,16 1.92
    6,9.3 9,9.3 8,9 3.31
    21,22 19,22 19,21.2 8.06
    9,12 9,13 11,13 2.82

    I got a paternity test saying he was 99.99% the father BUT this only test’s ten markers should I retake with more markers? I don’t believe he’s the father how do all of these numbers work? Is there any kind of chance the 99% is wrong?

    • Hi Worried,

      We suggest you contact the laboratory who conducted testing for you. The industry standard for markers tested in a paternity test is 15 so you whould ask them about how many markers they test and what precautions they use to make sure their test is accurate. Hopefully you can get some specific information from them in order to determine if you will want to take another test.

  19. My sister and I had a sibship test done to see if we share the same father. We know we have the same mother. The results came back inconclusive, but when I called to speak to someone about the results I was told that the percentage was 85.16 and anything above 75 would mean we are full siblings. How can that be when it is inconclusive? I don’t know why its inconclusive. So technically I have no proof that we are full siblings. Please Help!!

    • Hello,

      I apologize for your experience. Could you please email me your name, case number and password at bcarlile@identigene.com. I would be happy to look into your specific case and speak with our laboratory staff to get you a concrete answer. Thank you!

      Sincerely,

      B. Carlile
      Identigene

  20. I have a question, i did a paternity test with a man and my paper said 84.44444% but it said he was not the father. Please tell me how this even happened.

    • Hi Candace,
      If your Identigene results indicated that the probability of paternity was 84.44444%, you would have received an “inconclusive” result, not a yes or no answer to if he was the father or not.
      There are three types of results you may receive on your paternity test result. First is an inconclusive result, which means that we were unable to come to a conclusion based on the DNA submitted and tested. The probability of paternity would read somewhere in between 1- 98% probability. Second, you may receive a conclusive result which is then broken into two categories–”Excluded” or “NOT excluded.” A conclusive, result simply means we were able to come to a yes or no conclusion as to the paternity of the child based on the samples submitted. A conclusive result that reads that the father is “excluded” means he is excluded from paternity or that we do not consider him to be the child’s father. The probability of paternity will likely be 0%. Finally, you may receive a conclusive result that indicates that the father is “NOT excluded” which means we consider him to be the child’s father and that we cannot rule him out for paternity. In order to receive a conclusive, “NOT excluded” result, the probability of paternity will be 99% or higher.
      If you received results with a probability of paternity of 84% and it said he was not the father from another source, you may want to get the results directly from Identigene and speak with them about what the results mean. It is not usual to receive inconclusive results especially if the biological mother participates in the test. Please give us a call Monday- Friday, 9 a.m.-8 p.m. ET at 1-888-404-GENE and we would be more than happy to help answer any questions you have concerning your test. Thank you for choosing IDENTIGENE.

  21. I had a DNA test done…it was invasive test meaning I’m pregnant
    The results came back that the alleged father was excluded from being the father
    I did not have intercourse with anyone else
    I don’t understand how the results came back negative
    Please help

    • Hi Crystal,

      It sounds as if your doctor approved and sent in a amniocentesis or CVS (Chronic Veli Sample) collection. You can be assured that your results are 100% accurate as long as we received the correct samples. We have many controls and procedures to make sure we deliver an accurate result. That being said, if there is no other possible father and the test result came back that the alleged father was excluded, I would question if the collection or samples were tampered with. This sometimes happens when a test participant is dishonest in their sample collection. For example, we have seen instances where the alleged father sends in a sample of a friend, thus returning an excluded result. Did you witness the alleged father swab and accompany the sample to the mailbox? Another option you have is a legal collection. This will ensure that all participants are honest in their collection and the samples are not tampered with before they arrive to our lab. If you have any more questions regarding this, please feel free to contact our friendly client support staff at 1-888-404-4363. Thank you!

  22. I just have a question. I am actually do a test with you guys. Here is the thing. I had a test done 15 years ago and the results were a 99,97 percent he WAS the father. I failed to tell the testing center, I had had sex with another man within a 72 hour period, and that i was pregnant with twins. Do I need to add this to the test? And what are the chances of the DNA tests being different than 15 years ago?

    • Hi Kimberly,

      The results you received 15 years ago should match the results you receive today as long as all participants are and were honest in their collection and there is no tampering with samples. One concern you may want to address is the slight possibility that your twins could have different fathers. Although it is rare, if they are fraternal twins, they could have different fathers. This can happen if two separate eggs are fertilized by two different men. When you took your paternity test before, did you test both twins, or just one twin? Our recommendation is to contact our friendly customer service and they will be able to best advise you on how to go about your paternity test. Our phone number is 1-888-4040-GENE. Please let us know if you have any other general questions we can help you with.

  23. How man Loci are tested with identigene?

  24. Test was done on my baby it came back to be 0.00 but some of the dna matches I’m not understanding the results at all I wasn’t swab just the suppose to be father and my son and at the top it says 0 out of 1 could you please explain these results

    • Hi Ciara,

      Sometimes understanding your results can be difficult, we recommend that you contact IDENTIGENE so they can walk you through what your results mean thoroughly. Our phone number is 1-888-404-GENE. Below is some general information to help you get started.

      All of the human race have very similar DNA, so it is inherent that there will be some matching DNA among all individuals. With paternity testing, in order to establish a paternal or maternal relationship, the child must have matches at all locations from each side–one from the mother and one from the father. This is simply because a child inherits half of their genetic information from both parents. The exception to needing all locations to match is genetic mutations which happen, but rarely. In the case of genetic mutations, there can be mismatches at one or at most, two locations. Our genetic scientists can determine the likelihood of a genetic mutation by doing further testing.

  25. PLEASE HELP! I had a siblingship test done on my two sons. The representative did bucchal swabs on one day on the boys but contacted me days later to take mine as he had forgotten. The results were not as I expected as I was certain of the time I was with my younger sons father. There seemed to have been 16 loci tested. The results showed exact number matches on 6 out of 13 loci on allele A and on 8 out of 13 on allele B. The results also state a combined likelihood ratio of 215.9 and probability of relatedness as full siblings as 99.539%. When I called the company for clarification they claim the results are certain though they never received my sample. Should I also have had my daughter tested? How accurate are these results if they never considered my sample? If the two boys are indeed full siblings why are there not more matches? I thought males have near identical matches to their father.

  26. Hi

    I recently tested the alleged father of me I’m 35 he’s 65 it came back inconclusive but 13 outta 15 genetic markers match and two maybe due to mutations and it said he cannot be excluded cause 13/15 match but he’s saying he’s talking to the company and they said he’s 0% my father…but i don’t believe that…please help what are the chances he is my father like my mother said before she died…..Thanks

    • Hi Theresa,

      When test results come back “inconclusive”, this simply means that we couldn’t come to a conclusion to say yes, he is the father, or no, he is not the father. Many times this is because the mother is not able or does not participate in the test. This being said, if the test said that he is “not excluded” that means that we do consider him to be the biological father. Your test results can’t be “inconclusive” and read that he is “not excluded”. If you tested with IDENTIGENE, we suggest calling us to discuss your results directly. We can help you to understand what your results mean and make sure that you are given the correct results. Our phone number is 1 888-404-4363. Best of luck to you!

  27. recently we had two brothers tested to determine paternity of a child however I am not understanding how if they are brothers once DNA test results came up with zero match to the child and the other brothers test came up 99.996 he is the father. If these two subjects are brothers why are these results the closer match?Could these two not be brothers?

    • Hi Shan,

      This is a good question that would best be answered by our client support staff. We can answer your question with general information, but to know a more detailed answer, specific to your case, it would be best to contact client support at 1-888-404-4363.

      The numbers you are referring to are the probability of relationship which are based on the number of matches the child has with the alleged father. Although the two alleged fathers are brothers, each of their DNA is different which will greatly affect the number of matches in DNA with the child. When testing, a certain number of matches need to be present to be considered the father. It is most likely that the brother with the result of zero, has several mismatches of DNA between he and the child, which would produce a zero probability of being the father.There is a possibility the brothers have some similar DNA, and may have a few matches at similar locations on the DNA, but only identical twins have the exact same DNA inherited from each parent. Hopefully this helped to answer some of your questions. Please feel free to contact us if you would like more detailed and case specific information. Thank you.

  28. Hi, I would like to know how accurate would sibbling testing be of my baby and 2 alleged older step-brother & sister ( by his father from a past relationship).

    • Hi Brenda,

      Our tests are 100% accurate as long as the samples come from the correct person. Without a legal test (Identification is verified and collections are witnessed), we have no way of making sure the sample comes from the person expected to participate in the test. As for your question about a Sibling test, are you wanting to find out if your baby is a half sibling with his step brother and step sister or are you wanting to know the paternity of the half siblings? We recommend you contact customer service to discuss the best option of testing to answer your question. You can reach them at 1-888-404-4363 and they would be able to help you decide which test is best for your situation. Thank you!

  29. Hi my sons father had cheated on me with someone who ended up getting pregnant, she was also having intercourse with his first cousin. The results it exculdes 99.97% of of black men from paternity and that he isnt excluded from being the father, however the child looks like the cousin a lot but does have some features…the feet. Is there possibility it can be the cousins?

    • Hi Yolanda,
      As per our privacy policy, unless you are listed on the case or are a participant in the test and can verify the email and password, we can’t give you detailed information on the case. We recommend that the father of your son call IDENTIGENE at 1-888-404-4363 if he has questions regarding this question. Once we can look further into the case, we would be able to determine if there is a possibility that the child could be his cousins. Thanks!

  30. ok my friend tested a Guy and her child…it came back 8/14 is he the father? Could the chiold licking instead of swabbing make a difference?

    • Hello Anna,

      Did your friend have a paternity test from IDENTIGENE? We are not familiar with results in that format and are unable to interpret any results not coming from our lab. If your friend had an IDENTIGENE test and has questions about the results it would be best to have her call our client support staff at 1-888-404-4363. Thank you!

  31. I had a sibling dna test done on my two daughters and I included my dna with the test. I am trying to find out if they share the same fathers. The test results came back that i 64.75 % likely they were full sibling. Is that a good result and is it normal for full sibling numbers to be in that range.

    • Dear Stacey,
      I will forward your comment to our lab director. I will be in touch shortly with an answer. Thank you.

    • Dear Stacey,
      Your probability percentage is not an unusual finding when we are testing only one known relative of the alleged father. However, 64.75% is considered inconclusive and is not a good indication of whether or not the girls share the same father. We would suggest that if there are any more first degree relatives of the alleged father available, they also submit samples for testing. This includes any additional known children of the alleged father, his parents, or any full siblings that he might have. Hope this helps. Best to you!

      • Thank you for replying to my question. The only people tested in this test ws my two daughters and myself (their mother). Does that make a difference in the results. I was wondering since the answer said “one known relative of the alleged father”. Thank you again for responding.

  32. I recently had a paternity test taken with my alleged father. I didn’t realize that the paternity index and probability of paternity represent a comparison of the alleged father against random men in the population. I should have told the lab that there is a possibility that two other close relatives may be the father. My results excluded the tested father because we had four non matching alleles. Out of 23 test areas, I feel like four is not very many. I have two questions for you. First, Is it possible that two people unrelated will have 19 out of 23 matching alleles? Also, if the lab took into consideration the fact that two close relative’s may also be the father, could it have changed the calculation on my recent results?

    • Renee,
      For faster service and to specifically speak about your case, you will need to contact client support at 888-404-4363. With that said, for someone to be considered the biological father, they need to match at each allele. There are some exceptions to this statement. It is always best to communicate to our lab that the two possible fathers are related. I would recommend contacting client support, explaining your situation, letting them review your results statement with you and then they can decide if we should perform a retest. I have sent your question to client support. If they give me additional information, I will update this response. Thank you for contacting us.

  33. I recently discovered that my husband’s brother had DNA testing done on one of his children. The results showed a 93% match. It is possible that my husband is the father of this child. Is 93% a common occurrence when it might be a sibling that is the father? We are going to have the child and my husband tested…if he is the father will the numbers be closer to 100%?

  34. I have a DNA test result where we know the director’s signature was forged, however, they will not allow us another DNA test in court. I know one of the 3 is not mine despite what the DNA concluded. How do I confirm with the INDEX whether they tell another story from the conclusion?

    • Joe,
      Was this an Identigene DNA test? If so, you will need to contact our client support staff with your case number at 888-404-4363 and explain your concerns. One of our two laboratory directors sign off on every DNA paternity test that comes through our laboratory before the results are posted, double checking the results statement.

  35. Okay, so I’m really confused. I recently did a prenatal paternity test on one of the unlikely fathers of my unborn child. After a week and a half they called me and the only thing they said was “Yes, he is the father.” With no dna report or anything. Which was not the answer I was expecting. So I called them back the next day and asked them to re-do the test. The woman said that he matched 9 of the 15 genetic markers so that legally makes him the father. But I spoke to several different laboratories and they all said they were confused as to why they would say hes the father because a father has to match at all 15 points. This “laboratory” is in Canada. I don’t know if in Canada 9 out of 15 establishes paternity or what but everyone else is saying that is not true. All markers have to match. When I told them this she again repeated that having someone match up at 9 points is unlikely unless the true father and this one have similar DNA profiles. Now I’m confused. Is it really unlikely to have someone match up at 9 out of 15 points (The fathers are NOT related). This makes no sense and I’m really confused.

    • Janine,
      Identigene doesn’t have prenatal paternity testing. I can send your question to our lab director to see if she has any answers for you. The company you paid for the prenatal testing would be the best resource for giving you detailed information on your test. I would contact their client or customer support number.

  36. Okay, so I’m really confused. I recently did a prenatal paternity test on one of the unlikely fathers of my unborn child. After a week and a half they called me and the only thing they said was “Yes, he is the father.” Which was not the answer I was expecting. So I called them back the next day and asked them to re do he test. The woman said that he matched at 9 of the 15 markers and that makes him legally the father. But I spoke to several different labratories and they all said they were confused as to why they would say that because a father has to match at all 15 points. This “labratory” is in Canada. I don’t know if there 9 out of 15 of the points make him he father or what but everyone else is saying that is not true. All markers have to match. When I told them this she again repeated that having someone match up at all those points is unlikely unless the true father and this one have similar dna profiles. Now I’m confused. This makes no sense. Does this lab even know what they’re doing?? Is this man the father and here’s some weird protocols in Canada? I’m really confused.

    • Alexandra,
      Identigene doesn’t offer prenatal paternity testing. It would be best for you to contact the company that did your prenatal test and inquire about your test results. Thank you.

  37. Thank you so much for your answer. It does help with the questions. I will look more into possible more DNA testing. Thank you for your profession advice and help.

  38. I have a question. Both parents are passed. My sister claims my father has another child. My sister claims they did an $800 test and found that this child/woman has a 91.7% probability of being a sibling. Is it possible maybe a brother of my fathers is her father or maybe a cousin of his? How accurate is that 91.7%. Thank you for your help and advise.

    • Monika,
      I am going to pass this question to client support and our lab director. Once I hear back from them, I will respond with their answer. Thanks for your patience.

    • Monika,
      Not seeing the report, the Identigene lab director said that a 91.7% probability means that the test is inconclusive. This could be because the half-sibling in question has a different biological father and it is possible that one of your father’s relatives is the biological father, but there isn’t a real way to know unless a paternity test is done with the “child/woman and an alleged father”. If you want to test again with an Identigene siblingship test, Identigene would recommend all siblings and the alleged sibling test. The more DNA we have from known siblings will help strengthen the results when trying to determine half-siblingship. You can arrange this through our client support staff at 888-404-4363. We are running a $50 off the lab fee coupon (found on our Facebook page). Our test will cost approximately $350 w/the coupon. You will need to pay extra for additional participants. The test includes two siblings. If you, your sister and your alleged sister want to test, you will need to arrange for an additional participant with client support. http://www.dnatesting.com/dna-paternity-test/more-dna-testing/sibling-dna-test Best to you.

  39. isabelle ouellette

    the father of my kid just ask for a dna test the laboratory send a little bucal brush that i had to send back in a envelope tthe test result came back0% can it be false.

    • Dear Isabelle,
      We would like to review your individual case. Please contact client support at 888-404-4363 so that we can help you understand your results statement or possibly identify any collection variables that can affect accurate testing.

  40. My Ex boyfriends Mom swabbed him and ran a test on him and my daughter without my knowledge. My daughter’s dna was used from a previous grandparentage test. The clinic that ran the intial test fired the lab and hired a new one. The test was performed by there old lab and it came out 12 matches out of 15! He is the only person I was with!

    • Dear Jen, I am sorry to hear about your situation. If your ex-boyfriend would agree to another test, you can participate along with him and the child for accurate results. We have a coupon on our FB page for $20 off the lab fee. The probability of paternity has to be greater than 99% to be considered the biological father.

  41. hey just a quick question, my brother had a paternity test done and we both slept with the same girl.. long story.. and the test came back with 9 out of 13 gentic markers. is that an indication that i should get a test done? any help is greatly appreciated thanks

    • Yes. For a person to be found “not excluded” as the biological father, they must match at every marker giving the percentage of paternity at least 99% and the CPI (Combined Parentage Index) at least 100. Since your brother didn’t match the child at every marker, your brother was “excluded” as the biological father. (aka NOT the father)

  42. I had a dna test done and im not sure if the results are right is there anyway the results can be wrong.

    • Robert, The results are based off of the DNA submitted and received by our lab. Human error or fraud on the collection end could produce an inaccurate result. Our laboratory uses the highest accreditation standards and robotics to limit error on our end. We are always happy to discuss individual cases and results statements. We are also happy arranging retesting or legal testing (3rd party witnessed testing). Please call our client support staff at 888-404-4363 to discuss your situation. We want you to feel confident about your testing. We stand by 100% accurate results.

  43. Dr. Peola Butler Jackson

    Thank you so much for this site! It is helping me so much to investigate my own reported parentage, both of whom are dead. (I either have a mother who died at 21, or a mother who was her sister who died at 83. I either have a brother or a cousin by the first mother who died at 21 (in the same year I was born and we cannot find a death certificate for her in 3 stated!) I either have a full brother or a half brother bron to the mother or aunt who died at 83.) I had DNA tests done by another source. The results came back: .9471 to 1 for my having the same mother as male cousin. The results came back .4682 for same mother of supposed full brother. Then the researcher put in other information on supposed full brother which confused me: 1,333 to 1 full singling as compared to unrelated; 2, 842 to 1 for half sibling as compared to unrelated. In talking to them, I am more confused than I was before.
    The two women were full sisters. The father in question was married to the one who lived to be 83! I am 76 years old and got this information recently. I am confused.

    • Hello Dr. Jackson,
      I am forwarding your question to our lab director. I will be back with you soon. Thanks for posting.

    • Dear Dr. Jackson,
      We passed your comment along to our laboratory director. She tried to simplify an answer for you. She said that names (even just first names) would help her explain it further or draw you a pedigree diagram.

      Hopefully the below will make sense to you or generate some additional questions for you to answer.

      If you know that your mother is one of two sisters and not some unrelated person, then the statistics you received from the other company are irrelevant because you know she is NOT “unrelated”. Secondly, do the two male offspring of the women have different unrelated fathers? If so, do you suspect you could be a full sibling to either of these men? And did you test both of these male relatives? If so, and there were no other parents to test, then the statistic should be full sibling vs. cousin: to each man (not full sibling vs unrelated). But if you suspect that your father could be a different man than that of the male relative, then the statistic is half sibling vs. cousin (which would not give a conclusive answer).

  44. So if my test is 76/46 what does that mean?

    • Dear Katheryn, thank you for submitting your question. We are going to need more information from you to answer your question. Can you tell us where you are seeing those numbers? Thank you.

  45. I had a sibling test done with a potential half sibling and it came back with numbers and percentages. It notes that the theoretical ideal sibship index between two unrelated random individuals is 1. A sibship index greater than 1 indicates a higher likelihood of sibship. A sibship index lower than 1 indicates a higher likelihood of non-sibship.

    We came back at 1.04 (50.9%) likelihood of sibship. What does this mean? How high do the numbers go to? Is 50% and over 1 mean we are?

    Stella B

    • Hi Stella,
      Please contact IDENTIGENE’s customer service department at 888-404-4363. They can go over your results with you. I will notify them of your message. Thank you for contacting IDENTIGENE.

    • Hi Stella,
      First, the theoretical ideal sibship index between two unrelated random individuals when mom is not test is actually 0.05 for our testing. These are our numbers and we can not speak for other labs. However, 1.04 has no statistical significance. This means we need more 1st degree relatives of the untested relative in question, I’m assuming the alleged father is in question so a direct full relationship with the untested alleged father. A full sibling or other known child from the alleged father’s line could help. Please contact us at 888-404-4363 to set up additional relationship testing.

  46. I did a dna test with d man I know is d father of my child and it comes back 0% but most of the numbers match so he told me to d one with my x so I did it and the numbers are way off and I never slept with anyone else but I know something is wrong with the first test I think its not read properly but I know for sure something went totally wrong

    • Dear Trac,
      We always advise our customers to call our client support staff. They will help walk you through all the numbers on the results statement and explain the testing results. We want you to totally understand your results statement. Also, client support will be able to assess whether the test was preformed according to our package instructions. It is very common to have number matches. You and I could test together and have common matches but for someone to be considered the biological father, they would need to match at every location. The number is 888-404-4363. Thank you for contacting IDENTIGENE.

  47. What does it mean when you do a DNA test and shows all the numbers but does not give you the percentage! How many numbers have to match so you know the answer, if he is the father or not?! Is it possible that a man can be the father to a child but the dna test comes out that he is not because the mother gave the baby to much hormons?

    • Hi Leah,
      As far as I know all paternity testing companies give percentages on their results. In order for the alleged father to be a biological father they must match at each location. These matches are then calculated to give the probability of paternity percentage. A child will receive half of their DNA from mom and half from dad, it is not possible for the mother to give more DNA to the child then the father. Here is a link to a previous blog post about “Results Statements”. http://www.dnatesting.com/dna-testing-blog/2011/11/your-results-statement-simplified/

  48. i took a dna test and it came back 99.998% but only one locus that the dad did not have that my son had…i really want to no what these numbers are so i can see what traits he got from me..

  49. If a DNA test was done and the male childs was 99.9, but the oldest child was 93.0 (which is a girl), does that mean the male child is the man’s child, but not the girl. The father believes the son is his because the number was 99.9, but doesn’t believe the girl is his because hers was 93.0. He thinks his uncle may be the father of the girl?

    • Hi Kathee,
      DNA paternity testing is a test of exclusion and probability. We can never say a man is definitely the father. We can say that with a 99% or higher probability of paternity we would consider him to be the biological father of the child. However, the girl with a 93% would be inconclusive. This can happen if the mother does not test. We would recommend testing again with the mother. If the mother was tested along with the alleged father and child, we would encourage a second possible father be tested.

  50. Hi Nekki,

    When a paternity test result shows “excluded” but there are some matches this does not indicate a biological relationship in any way. You may get some matches, this simply means those markers are common in the population. You and I can test and have some matches, this again does not mean we are related in anyway, it simply means we share common DNA. To answer your question, No, this does not indicate they are biologically related in any way. We did not test for any relationship other than paternity.

  51. what does it mean to have 8 out of 15 markers..does this mean he is related to my son because i know he isnt the father…

  52. Hello, I recently had a half sibling test done. We match 8 out of 15 markers. But the test says unlikely biologically related. There are a couple of areas I’m confused on, first I don’t see an idex number. And second there are 3 things I don’t understand. First it say f/n 0.0001 prob % 0.0053153979
    h/n 0.0443 % 4.2391941236
    f/h 0.0012 % 0.1199339310
    What do the above numbers mean? Thamk you for any help.

    • Hi Steph,

      Based on the numbers you supplied it appears the lab tested for half siblings vs. not related, as well as full siblings vs. half siblings. Because I cant see the entire report your best option is to contact the laboratory who completed the testing to confirm what the numbers indicate. I can assume the % indicates the percentage of probability.

      For sibling DNA testing we like to get as much information as possible so we know what type of sibling relationship we are looking for. Again, I recommend contacting the laboratory and asking someone to walk you through the report.

  53. ATTENTION: ANTHONY CARTER
    MY CASE # WAS T182347/ORIGINATOR: GCS

    I USED IDENTIGENE TWO YEARS AGO. KEEP IN MIND, MY FATHER DIDN’T TELL ME UNTIL AFTER MY MOTHER PASSED…THAT HE DIDN’T THINK I WAS HIS CHILD. THAT WAS HARD TO WRAP MY BRAIN AROUND! I AM THE YOUNGEST OF SIX CHILDREN. HOW COULD THAT BE I ASKED MYSELF?
    SO WE DID THE IDENTIGENE TESTING. I DO BELIEVE IT IS CORRECT. I JUST WISH I COULD MAYBE GET A BREAK DOWN OF WHAT ALL THE NUMBERS MEAN. CAN YOU HELP? I AM SO HAUNTED BY THIS. I FEEL LIKE HALF A PERSON….

    • Hello Leah,

      I understand that what you are going through must be very difficult. To help you understand your results I recommend contacting our client support team. They are always willing to answer any questions you may have, if you like you also welcome to ask for me, my name is Amber. You can contact our client support team Mon-Fri 9am-8pm EST at (888) 404-4363. Any of us would be happy to review your results in detail to help put your mind at ease.

  54. My friend recently had a DNA proving he was not the father of the child. There are several markers (7/15 matched). Is there a way by looking at the results if the child is the biological child of my friends brother. (in other words, are they uncle/nephew).

    Thanks!!

    • Hi Jeff,

      In order for him to be the biological father of the child he has to match at every location. There may be matches but that could mean they are very common among the population, and not indicate any biological relationship. You and I could test and have matches, it dose not mean we are related, but simply the numbers at those markers are common among the population. If there is a chance that the alleged father’s brother could be the biological father, i recommend that he get tested with the child as well.

  55. I should have included in the previous email that the test covered 20 matches. The child & possible father matched on 10 of these areas.

  56. My daugther had her son and the possible father tested. The DNA test came back with 50% match. The results said he could not be the father. Should the test be redone or is this a common occurance in testing?

    • Hi Kay,

      With the IDENTIGENE paternity test results they will show either 99% or higher inclusion, or 0% exclusion. Anything in between is reported as inconclusive. One thing you may notice is there may be some loci matches between the alleged father and child. This can happen without him being the biological father. In order for him to be the biological father the child must match with him at EVERY loci. If there are “some” matches it simply means they are common in the population. You and I could test and have some matches. It does not mean we are related, but simply those specific numbers at those specific loci are common among the population.

  57. Hello Amber

    I need your help… Some years ago I took a DNA test with my daughter and her “father.” The DNA test was done through the county whereas once you arrive, no one is permitted to leave. However, the “father” did leave for a while and when he returned he had a red blow pop in his mouth. A few minutes later the test was done. Months went by and I received the results in the mail. The results were in the 70-80% range and my daughter and the alleged “father” shared 11/13 traits. I believe that’s what there’re called. I have stuck to my guns about the guy being her natural father, and asked that the test be retaken, but this was never done. I found out my daughter contacted him through Facebook and we have not had anything to do with this man or his family. Is it at all possible that he is her “father?”

    Thank you

    • Hi Tosha,

      It is possible. When there are 2 mismatches, they may be mutations. In situations like that we do not report that, we would try and get more markers tested to confirm the relationship. The fact that he had a blow pop would not make a difference. It would not change his DNA. If anything it would contaminate the DNA which means they would not be able to get a full profile at all and would need to recollect. Because that did not happen tells me the DNA was not contaminated. I would encourage another test.

  58. I Have took three dna test with to diferant men that could be my half brother and one girl that could be my half sister. butt i was not explain the one was 0.1229 …10.9% 8 to 2nd was 0.0023 0.2% 435 to 1 the 0.1006 9.1 10 to 1

  59. What do the percentages gathered from a autosomal test add up? It gave regions of the globe supposedly genetic inheritance is derived. How should these percentages be interpreted?

    • Hello Evalina,

      Thank you for your question. Your question has to with ancestry DNA testing. IDENTIGENE does not offer ancestry testing, however, you may be able to find the information you are looking for with ancestry.com. Here is there website link:

      http://www.ancestry.com/

      They specialize in ancestry, and are a wonderful company to deal with.

  60. Recently i had a dna test done on my daughter, regretfully she was not my child. I have a strong feeling that the child in question is my brothers, how can i tell if this is so by looking at my results. it seems to me if my sibling was the father it would tell me on my results if i knew what i was looking at