Determine whether two individuals share both biological parents with our full sibling DNA test kit. This test compares the DNA profiles of two alleged siblings to calculate the likelihood that they are full siblings versus unrelated individuals.
For the highest accuracy possible, the mother must test.
2-3 Days
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Results in 2-3 business days.
Determine whether two individuals share both biological parents with our full sibling DNA test kit. This test compares the DNA profiles of two alleged siblings to calculate the likelihood that they are full siblings versus unrelated individuals.
For the highest accuracy possible, the mother must test.
Each participant provides a painless cheek swab sample at home. Our state-of-the-art laboratory performs advanced sibship analysis comparing the genetic profiles to calculate a sibship index, a statistical measure of the likelihood that the tested individuals are full siblings. Results are delivered within 2-3 business days through our secure online portal.
Important: This is a peace-of-mind (informational) test for personal knowledge. If you need court-admissible results, please see our Legal Full Sibling DNA Test Kit.
A full sibling test determines if two people share both biological parents, while a half sibling test determines if they share only one biological parent. The type of test you need depends on whether both parents or just one parent is in question.
A sibling test can provide strong evidence of a shared biological father when the alleged father is unavailable for direct paternity testing. Adding the mother's DNA can strengthen the analysis. For the most definitive results, a direct paternity test is recommended when possible.
Sibling DNA tests are highly accurate when performed by a qualified laboratory. Results are expressed as a sibship index and probability percentage. Including the mother's DNA sample can significantly improve the statistical strength of the results.
Learn more: How DNA Testing Works | DNA Test Cost Guide
Place your order online and receive your DNA collection kit within 2-3 business days via priority mail.
Follow the simple instructions to collect painless cheek swab samples from each participant. The process takes under 60 seconds per person.
Use the included pre-paid return shipping label to send your samples to our state-of-the-art laboratory.
Access your confidential results through our secure online portal. Results are typically available within 2-3 business days.
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US Diagnostics Center
333 Conover Dr., STE C
Franklin, Ohio 45005
Phone: (937) 790-9991
Email: support@usdctest.com
