How is paternity tested? Paternity testing is a technical means to determine whether there is a biological relationship by analyzing the DNA of parents and children. Below, we will introduce the method and process of paternity testing in detail. Step 1: Collect samples. Paternity testing requires the collection of samples for testing. Generally, the samples collected include blood, oral mucosa, hair, nails, etc. The process of collecting hair and nails is simple and non-invasive, while the collection of oral mucosa requires professional and technical personnel. , and blood collection needs to be done in a hospital or laboratory. Blood Collection Process: High Quality Blood Collection