Technical requirements for paternity testing Paternity testing is a scientific and technological method that verifies whether there is a biological relationship by comparing DNA samples between parents and children. Therefore, its technical requirements are very high, which are mainly reflected in the following three aspects: First, DNA extraction technology. This is the core part of paternity testing. The extraction and purification of samples must strictly comply with relevant operating procedures to avoid contamination and errors. The second is PCR amplification technology. Target DNA-like