DNA paternity tests have an extremely high rate of accuracy. A study of noninvasive prenatal paternity tests that collected blood samples from pregnant people as early as 6 weeks into their pregnancy and compared them against genetic samples from potential non-gestational parents confirmed parentage in 100% of the cases. The study additionally found that unrelated potential parents were excluded 99.95% of the time. Only 0.05% were indeterminate and there were no miscalls.