From the laboratory's point of view, it is possible to produce a paternity test report in 8 hours or even less. However, in the actual acceptance process, most paternity testing institutions are often unable to issue paternity testing reports within 8 hours due to cost control and risk considerations, as well as the uncertainty of receiving samples. Once the sample detection has special circumstances (such as gene mutation), the time will be longer, requiring customers to pay high expedited fees.

Paternity identification is to use the theory and technology of medicine, biology and genetics to analyze the genetic characteristics and judge whether the relationship between parents and children is a biological relationship from the similarity of morphological structure or physiological function between offspring and parents. The detection of routine samples includes the following steps (taking capillary electrophoresis apparatus and fluorescent labeling kit as examples here): step one: extract and purify the DNA contained in the sample nucleus to remove impurities in the sample; Step 2: the DNA fragment to be detected is amplified to the extent that it can be seen clearly with special instruments through enzymatic reaction; Step 3: Open the double-stranded DNA structure and add some internal standards for detection. Marking the length of the detected fragment Step 4: Capillary sequencer detection. According to the fact that DNA has a certain charge, the electrophoresis speed of DNA with different fragment lengths will be different through capillary electrophoresis, and the swimming distance will be different under the same charge and the same electrophoresis time. These distances with different lengths can be marked by the internal standard measurement added in the early stage and displayed on the computer through certain software. Step 5: The inspectors analyze, summarize and calculate the obtained results, and then give the appraisal conclusion and report. This is the whole process of DNA paternity. Routine samples (such as blood stains, hair, oral swabs, etc.) generally take seven working days. ) to get accurate identification results, and special samples (teeth, muscles, etc.) need ten to fifteen working days. Every sample in our central laboratory is tested by two groups of experimenters, and the data obtained are compared before a report can be issued. At the same time, in view of special circumstances such as gene site mutation or DNA identification between close relatives, our center is also equipped with a variety of gene detection kits, with 20-28 detection sites to ensure the accuracy of the detection results. If the customer needs to know the result urgently or the public security organ needs to solve the case, our center provides expedited service, which can be expedited to two or three working days. But in this case, at least two appraisers worked overtime all night.