How soon can you get a paternity test done?

After birth: This can be done on cells obtained from the womb by amniocentesis or from the placenta by cvs. Both procedures have some risk to mom and baby and paternity issues are not considered worthy of the risk. As soon as the kid is born, material can be obtained & sent.There are several commercial labs that do this and the hospital should have a number for information.It is not covered by insurance.