idto grandparent dna test

What is a Grandparent DNA Testing?

A grandparent DNA test is a test that helps to determine a biological relationship between grandparents and a grandchild. Grandchildren share 25% of DNA with their grandparent/s.

This testing option is performed when the alleged biological father is unavailable to tested. It is recommended that the mother of the child participates in DNA test for increased accuracy.

Common use cases

A grandparent relationship test are commonly used to established paternity for legal custody cases or to add a deceased biological father’s name on to his child’s birth certificate.

A legal Grandparent DNA Test is tests that requires a legal chain of custody be established. DNA samples will be tested and analyzed by our partner AABB-accredited DNA Testing laboratory.


All legal DNA testing services we offer are performed by our partner AABB-accredited DNA Testing Laboratory for the purpose of establishing a proper legal chain of custody for evidence submission.

How much is a grandparent DNA test cost?

Legal grandparent DNA testing starts at $499.99. Please note, sample collection fees are not included in the price.

Testing Accuracy:

If there is a probability of a relationship the result will show 90% or higher to support the analysis of your DNA test.

In the event that the analysis does not support the probability of a relationship, the conclusion of the analysis will support it.

A report may also be generated that reflects an inconclusive Grandparent DNA test result. This may sometimes occur if the mother of the child is unavailable for testing. The range for an inconclusive DNA test result is between 9% and 89%.

Scheduling an appointment:

The process is simple, We have access to over 2000 collection site nationwide in our network. Please contact IDTO today at 888-204-0583 to schedule an appointment.

Sample Collection Method:

The primary method for collecting samples is through a cheek swab, which is less invasive and generally painless. An alternative method is blood collection, is more painful. Both options offer the same level of accuracy in producing a DNA profile.

At-Home Grandparent DNA Test

At-Home Grandparent DNA testing can confirm or disprove a biological relationship between a grandparent and grandchild. This testing option requires self collection.

Pricing starts at $299.99. Click button below to purchase online.

home grandparent dna test

DNA Test Kit Contents

4-6 Sterilized cheek swabs each packet has 2 swabs per person
Contact Identification Form
Sample collection instructions
Prepaid overnight FedEx return shipping envelope
Turnaround Times

Results will be completed within 2 to 3 business days from the date the laboratory receives all genetic samples. After the completion of your results, a copy will be mailed to your home, and another copy will be emailed to you.


Cost of your DNA Test includes prepaid domestic shipping to your home and returning back to the laboratory.

Accuracy & Reliability

All DNA specimens will be processed and analyzed by our partner laboratory AABB-accredited, ensuring the highest standards of accuracy and reliability in testing all DNA specimens.

Please keep in mind home DNA tests are for informational purposes only. Therefore, At-Home DNA Test results are not legally admissible. While our Home Tests are intended for informational use only and cannot be used legally, the results are tested to the same strict protocols as legal paternity tests.

How The Process Works:

Getting started with a peace of mind test is simple. Below is a brief outline of what you can expect from our At-Home DNA Grandparent Testing process.

Order below or contact our office at 888-204-0583 to purchase your DNA kit by phone or click here to buy online.

After you purchase your test kit, please allow up to 24 hours or one business day to ship your kit to your home.

Once you receive your kit, follow the instructions on how to collect your DNA samples. Sign the chain-of-custody form. Place all of the contents you receive inside of the prepaid return envelope you received and ship your genetic samples back to the lab for analysis.

When the lab receives all of your genetic samples. Please allow 2 to 3 business days for your results to be completed. Upon the completion of your results, a copy will be sent to your physical home address and a copy will be sent by email.


Please note that the IDTO DNA Testing Center’s partner laboratory does not share any personal or genetic information with third-party companies.

All information provided to our partner laboratory is kept secure and will only be released to third parties with the explicit consent of the participants involved or by court order. DNA samples on file are kept for 3 months on average and then destroyed.