This diagnostic genetic test procedure is known as percutaneous umbilical cord blood sampling.

CVS usually takes place at 10-12 weeks' gestation, earlier than amniocentesis or percutaneous umbilical cord blood sampling.

Another test using blood taken from the fetal umbilical cord is percutaneous umbilical cord blood sampling.

Percutaneous umbilical cord blood sampling (PUBS), also called cordocentesis, fetal blood sampling, or umbilical vein sampling is a diagnostic genetic test that examines blood from the fetal umbilical cord to detect fetal abnormalities.