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How accurate are paternity tests?

On Behalf of | Sep 19, 2024 | Father's rights & paternity

When it comes to family matters, especially during a divorce or custody battle, knowing the biological father of a child can be crucial. Imagine the peace of mind that comes with knowing the truth. But how accurate are the paternity tests available today? 

Types of paternity tests 

Several types of paternity tests are available, each with its method and level of accuracy. Two of the most common are DNA testing and blood group testing. 

  1. DNA testing: This is the most accurate method available today. DNA paternity tests compare the DNA sequences of the child and the alleged father. Since a child inherits half of their DNA from each parent, this test can determine paternity with over 99.9% accuracy.  
  1. Blood group testing: This older method is less accurate than DNA testing. It involves comparing the blood types of the mother, child and alleged father. While it can exclude a man who is not the father, it cannot definitively prove paternity. Blood group testing relies on the principles of inheritance of blood types, but since many people share the same blood type, it is not as conclusive as DNA testing. 

Paternity tests are necessary tools in many legal and personal situations. They provide clarity and can help resolve child support, custody and inheritance disputes. While DNA testing is the gold standard due to its high accuracy, other methods, like blood group testing, can still play a role in specific contexts. 

What happens if I find out that I’m not the biological father? 

Discovering that you are not the biological father can be a life-altering revelation. It can bring about a range of emotions, from relief to confusion and even grief. Legally, if you are not the biological father, you may not be obligated to pay child support or have custody rights, depending on the laws in your jurisdiction.  

However, if you have established a strong emotional bond with the child, you might still want to be involved in their life. Consulting with a lawyer can help you understand your rights and options in such situations.