Preimplantation Genetic Screening (PGS)

The PGS test provides information about embryos in case of chromosomal abnormalities.

PGS is typically used to evaluate embryos with the help of a cell biopsy and testing. It looks for the normal number of chromosomes (called euploidy). During fertilization, an embryo receives 23 chromosomes from each parent (a total of 46). An abnormal number of chromosomes (called aneuploidy) causes birth defects and pregnancy loss. The most common conditions due to chromosomal abnormalities are:

Down Syndrome

Turner Syndrome

Klinefelter Syndrome

If individuals or couples suspect a chromosomal abnormality causing the mentioned disease, a PGS is recommended where a geneticist performs a comprehensive evaluation of family history.