 [ Symptoms ] would my obgyn do a dna paternity test at 8 weeks if i asked [ Disease ] currently prenatal dna testing for paternity involves invasive procedures that carry a risk of miscarriage these procedures typically are not performed until at least 10 to 15 weeks gestation therefore it is unlikely your ob gyn would be willing to attempt such testing at only 8 weeks gestation prenatal testing for paternity actually is rather rare and reserved for special circumstances most paternity testing is performed after the baby is born i would urge you to discuss the issue of prenatal paternity testing with your ob gyn to get his or her advice on whether or not it would be advisable in your case all the best to you