Cordocentesis – also called fetal blood sampling, Percutaneous Umbilical Cord Blood Sampling (PUBS), and umbilical vein sampling – is a highly specialized diagnostic test performed in the second trimester to check for genetic defects in the developing baby.
During a cordocentesis, a doctor will remove a blood sample from the baby’s umbilical cord. (This is why this diagnostic procedure is often referred to as fetal blood testing, or fetal blood sampling).
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