There’s a big difference in small numbers, and this is why it’s important to find a lab that offers 99.99% probability of paternity. The different between a 99% and 99.99% probability, is that a result at 99.99% is 100 times more accurate.
PTC Laboratories guarantees a minimum probability of paternity of 99.99% on every DNA normal paternity test (motherless tests, at-home tests and mutations are all included in our guarantee). At a 99.99% probability of paternity, on average, the identified DNA genetic pattern will fit no more than 1 in every 10,000 men in the population group. And most of our DNA paternity tests are even more discriminating than that, at 99.999+%.
Often, labs that issue positive results of 99% probability of paternity will then offer to continue testing using a different method, such as RFLP, at an additional charge. At PTC Laboratories, our test fee includes testing, by whatever method necessary, to reach a 99.99% probability of paternity for all positive tests, including switching from PCR to RFLP testing, with no extra or hidden charge to you.