Until about a year ago, if a pregnant mother wanted to confirm the paternity of her unborn child, she had to undergo very invasive testing. For this test, the only requirement for the mother is 10 ml of her blood, and for the alleged father 5 ml or a buccal swab. Although this test can be done at 11 weeks, we encourage our patients to wait at least until the 14th week of gestation. Fetal DNA circulating in the mother’s blood is detected and analyzed using microarray SNP technology. We can then compare the markers between the child and alleged father to determine paternity. Results are 99.99% accurate.