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We also work with the associated laboratory EasyDNA.
Order your test
Get instructions
Collect samples
Send to the lab
Discover your results
Your samples are analyzed by our partner laboratory:
Endeavor DNA Laboratories
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We don't send DNA kits!
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It's up to you to make your DNA kit with saliva samples.
You can place the order from any country.
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Place your order to receive by email:
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your customer code;
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sample collection instructions;
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the online consent form;
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the shipping form to print, fill out and send;
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the laboratory's address.
Product details
The DNA test and instructions include the use of saliva samples for both participants.
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Addition of an extra participant: 99.00€
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Addition of a non-standard sample: 69.00€
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Organization of the sample shipping by the laboratory: 50.00€ (FEDEX)
All options must be requested by email: contact@infotestadn.com
Options
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Results within 3 to 5 working days after receipt of saliva samples.
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Results within 10 working days for other types of samples
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The results are sent by email and then automatically destroyed within 60 days.
Results
Grandparent Parentage DNA Test
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DNA testing with grandparents can be done with:
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Saliva samples (Sterile buccal swabs)
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Non-standard samples : Like hair, nails, toothbrush...
Be careful, you must follow the instructions and respect the conditions so that the samples provide enough genetic information for your test.
What type of sample is used
for the test?
You can do a DNA test to find out the parentage at home in a private setting. The order can be made directly on the internet from your home in order to receive the sampling equipment at home.
Only, it is still impossible to obtain a DNA test in a pharmacy, moreover only a laboratory with genetic analysis equipment and accredited by international standards can provide the result for a DNA test to know the parentage.
How to do a DNA test between grandchildren and grandparents?
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The Grandparent Parentage DNA Test determines the probability of kinship , between a child (grandson and/or granddaughter) with their grandparents (grandfather and grandmother).
The test is a genetic comparison in order to establish a biological parentage on the side of a presumed father or mother.
The test can be done with buccal samples and non-standard samples. Those tested include a child and a grandfather with the grandmother.
What is a grandparent parentage test?
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The biological grandfather must participate in the test
For a paternity search between exclusively a grandfather and a grandson, it is advisable to use the Y Chromosome test
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The biological grandmother must participate in the test
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For a maternity search between a grandmother and her grandchildren, it is advisable to use mitochondrial DNA test
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For a paternity search between the grandmother and a granddaughter, it is better to use the X chromosome test
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One or more children can participate in the test
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Children can be full siblings
Children can be half-brothers or half-sisters
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Unfortunately, the answer is no! Genetic analysis to determine parentage using the genetic profile of a single grandparent is not sufficient to establish accurate and reliable results.
Depending on your search for paternity or maternity and depending on the participants available, you can:
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Paternity research :
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You can do a Y Chromosome test between a grandfather and his grandson
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You can test the Chromosome X between a grandmother and her granddaughter
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Maternity search :
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You can do a mitochondrial DNA test between a grandmother and her grandchildren (boy, girl)
Can I do a test with only one grandparent?
Consent is the agreement you give to the laboratory to use your DNA for the purpose of carrying out a genetic analysis. It is mandatory if you want to do a genetic analysis test.
Consent can only be given explicitly by an adult and fully lucid person.
This agreement must be drafted after having received information about the outcomes of the test, through a contract or a consent form.
It is against the law to do a DNA test without the person's consent.
For minors, consent must be provided by one of the legal parents.
What is consent for a DNA test?
Grandparent Test Participants
A child inherits exactly 50% of his genes from his biological mother and 50% from his biological father, therefore this child shares exactly 25% of his genes with each biological grandparent.
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Based on the number of genetic matches, the lab calculates the statistical probability that the presumed grandparents are biologically related to the child. To perform this DNA test, the grandfather and grandmother must be the biological parents of the presumed father or mother.
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Since the child has only 25% of genes in common with his grandfather and 25% with his grandmother, it is mandatory that both biological grandparents participate in the test with the child.
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On average, the test of parentage grandparents allows the laboratory to determine only half of the genes of the alleged parent.
Parent Involvement
It is always recommended to test one or both known parents to obtain the most accurate results possible.
Since a child’s genetic makeup consists of only half of that of their parents.
The participation of the parents in a grandparentage test allows the exclusion of half of the child’s DNA, leaving the other half for comparison with the DNA of the person being sought. This improves the reliability of the results.
In this sense, it is very important to perform this test with the biological parents (grandparents) of the presumed parent (the alleged father or mother). Otherwise, the test will not be conclusive.
If, in your search for kinship, the doubt concerns presumed parents from the same family, then all known parents must participate in the test along with the children.
Otherwise, the results may lose accuracy. As a general rule, the more genetic information is available, the greater the likelihood of obtaining conclusive test results.
The reliability and authenticity of the test between grandparents and grandchildren depend on several factors:
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The quality of the samples
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The laboratory’s accreditation
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The choice of test according to the family situation
The quality of the DNA will depend on the collection and preservation of the samples. It is therefore important to follow the laboratory’s instructions to ensure reliable results.
Accredited laboratories meet the requirements for the analysis process, resource and equipment management, impartiality, and confidentiality of information.
For a DNA test with grandparents, the laboratory must hold ISO 17025 accreditation.
The reliability of the results depends on the number of genes compared. Most laboratories offer tests comparing an average of 15 to 22 genes (STR loci) to establish comparisons between participants.
Depending on your situation, you have the option to request an extended comparison of the number of loci from the laboratory. An extended comparison improves the precision and, therefore, the reliability of the results.
How reliable are the results?
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5-7 days using buccal swabs for all participants
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10 days and more if a participant uses discrete samples
This time is calculated from the moment your samples arrive at the laboratory. The delivery time is not taken into account.
What are the analysis times for a test with grandparents?
The results are presented in the form of a table:
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Each column corresponds to a participant
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Each row to a gene
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The composition of the gene is represented by one or two numbers on each profile
The DNA analysis with the grandfather and grandmother is an indirect relationship test.
The genetic laboratory attempts to reconstruct the genetic profile of a father or mother using only the information from the biological parents (grandfather and grandmother).
Thus, the test is based on statistics and probabilities, which play an important role in interpreting the results. Participants may have alleles that differ due to random inheritance, which is nonetheless common.
Conversely, having similar alleles does not necessarily confirm a common parent.
It is possible to obtain inconclusive results.
Verification of the participants’ relationship:
The DNA test to determine a familial link is presented with a relationship index.
This index, based on 1, expresses the probability of shared genes between participants. The relationship index is then converted into a percentage of relation.
The results of grandparentage tests must be interpreted in terms of probability, and the relationship index is translated into a percentage ranging from 0% to 99.99%.
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If the index is greater than 1 and the percentage is above 90%, the test is positive.
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If the index is less than 1 and the percentage is below 10%, the test is negative.
How to read the results of
a parentage test?
Frequently Asked Questions
How accurate is a grandparent DNA test compared to a paternity test?
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A grandparent parentage DNA test is less accurate than a paternity test because the conclusiveness of the results can vary. Thus the probability of a relationship will depend on the number of participants and the initial family situation.
To reinforce the conclusiveness of the test results, we recommend that both biological grandparents participate in the test and if possible that the mother (or father depending on the situation) of the child also participates. When the grandparents and the mother participate in the tests, the probability of paternity is almost always lower than a paternity test.
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Can we do the grandparent parentage test using only one grandparent?
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In fact, it is possible. You can do this DNA test using samples from just one grandparent and the child; however, the chances of obtaining conclusive results are drastically reduced. If possible, we always recommend including DNA from the mother (or father depending on the situation) in grandparent DNA testing. Be careful, some laboratories refuse the test with only one grandparent, judging the results not reliable enough for customers.
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Can the DNA test be done without the known parent
(mother or father according to situation )?
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Yes, a grandparents test can be done without the mother, although it is strongly recommended that she is included as well. His participation helps analysts determine more clearly which of the child's DNA comes from the father's side and from the mother's side and can also help strengthen the probability of a relationship percentage. Same principle in the search for maternity with the father added to the test.
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Can a relationship test with grandparents be used for legal or administrative reasons?
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Yes, a grandparents DNA test can be used for legal reasons provided a procedure has been put in place and followed. More information regarding legal testing here.
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Test participants must provide proof of identity at the appointment and collection by a medical professional. Forensic grandparents test results are admissible in court and can be used for legal and administrative reasons. The results of a grandparents' home DNA test cannot be used legally.
The DNA paternity test is a genetic comparison between the DNA of an alleged father and that of a child.
It is the most and most reliable DNA test to confirm a biological parentage.
Paternity test
Biological sample
Biological samples are used to extract DNA during genetic analysis.
There are several kinds of sample and you must choose the one that best suits your situation.