Prenatal Testing with Chorionic Villus Sample (CVS).
This test can prove the paternity of a child before it is born.  The CVS procedure is a medical procedure that typically is performed between 10-13 weeks gestational age. 
This procedure is done by removing a very small portion of the placenta through a vaginal procedure.  The mother must discuss with her doctor (OB-GYN) the potential risks involved, along with making arrangements to have the procedure performed. 
transCVS tissue also is time sensitive and must be started immediately upon receipt of the samples.  Must have samples of the mother, alleged father, and the CVS sample.  The average turnaround time is 1-2 weeks from the receipt of samples.