DNA Testing News, Guides & Resources
Explore the latest DNA testing information, educational guides, and helpful resources from Validity Genetics.
Our articles cover Paternity DNA Testing, Relationship DNA Testing, Infidelity DNA Testing, Forensic DNA Testing, and Legal DNA Testing. Whether you're learning how DNA testing works, comparing testing options, understanding your results, or preparing DNA samples for laboratory analysis, our goal is to provide clear, accurate, and easy-to-understand information.
Browse our articles below to learn more about DNA testing and find answers to your questions.
Not the Father? Why are there matches on the Paternity Test Result?
Why does a paternity DNA test show matching markers when the alleged father is excluded? Learn how negative paternity results work, why unrelated individuals can share DNA markers, and what a 0% probability of paternity means.
Fourth of July Lab and Office Closure on July 3rd
Please note that our office will be closed on Friday, July 3, 2026, in observance of the Independence Day holiday, as Independence Day falls on Saturday, July 4 this year.
How Blood Detection Testing Works
How does blood detection testing work? Learn how RSID Blood confirmatory testing detects glycophorin A to help identify the presence of human blood on an item.
What Causes an Infidelity DNA Test to Be Inconclusive?
What does an inconclusive infidelity DNA test result mean? Learn why inconclusive results occur and what factors can affect DNA analysis and interpretation.
What Happens If No DNA Is Found?
What happens when a DNA test finds no DNA? Learn why DNA may not be recovered from a sample and what factors can affect DNA testing results.
How Saliva Detection Testing Works
How does saliva detection testing work? Learn how RSID Saliva confirmatory testing detects the human-specific protein alpha-amylase to help identify saliva on an item.
Can Saliva Be Detected on Clothing?
Learn whether saliva can be detected on clothing, how saliva transfers to fabrics, and the factors that affect the ability to identify saliva on an item.
What Happens If Multiple DNA Profiles Are Found in Infidelity Testing?
What does it mean if a DNA test finds more than one contributor? Learn how mixed DNA profiles are analyzed and what these results may indicate.
How Accurate Are Infidelity DNA Tests?
How accurate are infidelity DNA tests? Learn how semen detection and DNA comparison testing work, and what factors can affect the reliability of results.
What Do Infidelity DNA Test Results Look Like?
What do infidelity DNA test results actually show? Learn how to read semen detection findings, DNA profiles, and comparison results from real lab reports.