Whole genome sequencing (WGS) of the embryo is a more comprehensive approach to prenatal testing than all other Preimplantation Genetic Testing (PGT). With WGS, not only can the health of the embryo be assessed, but also the health of the parents can be screened for genetic disorders.

PGT is limited to detecting large chromosomal abnormalities in a single cell from an embryo. However, WGS can detect genetic abnormalities in all the cells of an embryo. This is important because many genetic abnormalities are not detectable in a single cell and may only be detected by WGS.