Respuesta :

Maternal blood sampling  involves the assessment of cells that have passed through the placenta.

Maternal blood sampling includes a simple blood test. It is used to measure the amount of two proteins, namely, human chorionic gonadotropin (hCG) as well as pregnancy associated plasma protein-A (PAPP-A).

If the protein levels are unusually high or low, it can suggest that the baby may have a chromosomal disorder.

Maternal blood sampling or serum screening can be performed in the first trimester, known as combined first trimester screening (CFTS), or in the second trimester as well.

Maternal blood sampling gives an approximation of the possibility that a pregnancy may have a chromosomal condition.

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