Percutaneous umbilical cord blood sampling - series—Normal anatomy: MedlinePlus Medical Encyclopedia

If you are at risk for having a baby with a genetic defect or blood disorder, your doctor may recommend percutaneous umbilical cord blood sampling (PUBS), which is performed at 18 weeks

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Percutaneous umbilical cord blood sampling - series—Normal anatomy: MedlinePlus Medical Encyclopedia

Percutaneous umbilical cord blood sampling - series—Results: MedlinePlus Medical Encyclopedia

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Percutaneous umbilical cord blood sampling - series—Procedure, part 2: MedlinePlus Medical Encyclopedia