How long does it take for a paternity test to produce results? The parent-child relationship is one of the most important blood relationships in human society. However, in some cases, there may be doubts about paternity and a paternity test may be required to confirm or rule out a biological relationship. Paternity testing is a high-precision and highly sensitive testing technology that requires inspection and judgment by professional testing agencies to draw accurate conclusions. So, how long does it take for a paternity test to produce results?