DNA paternity is the application of str typing detection technology in life. Str typing test is dna test. STR typing detection has gone from the initial 9 loci to 16 loci, and now to 20 and 40 loci. More and more human genetic markers have been developed, and their accuracy is becoming more and more accurate.

DNA paternity's standards are the same. With more and more human loci being marked, the parental probability is getting closer and closer to 100%. Throughout the development of paternity testing technology, the control index of parent-child relationship is getting higher and higher. 1983, the cumulative parent-child index is greater than or equal to 400, and the parental right probability is greater than 99.75%; 1998, the cumulative parent-child index is greater than or equal to 2000, and the paternity probability is greater than 99.95%. The cumulative parental index of 20 10 is greater than or equal to 10000, and the parental probability is greater than 99.99%.