Can a paternity test be performed during early pregnancy? Paternity testing is a technical means to determine the parent-child relationship by detecting genetic differences between parents and children. Many people believe that conducting a paternity test in the early stages of pregnancy can determine the father of the fetus as early as possible and eliminate doubts about the parent-child relationship. However, in fact, there are still many technical limitations to paternity testing in early pregnancy, which will be elaborated on from multiple perspectives below. Specimen quality requirements are very high in early pregnancy