Preimplantation Genetic Testing (PGT)

Preimplantation Genetic Testing (PGT)

Preimplantation Genetic Testing (PGT) is an elective test in which IVF embryos are screened for general chromosome number abnormalities (aneuploidy), or for specific genetic disorders, prior to transfer and subsequent implantation.

PGT was previously known as Preimplantation Genetic Screening (PGS) and Preimplantation Genetic Diagnosis (PGD). However, the International Glossary on Infertility and Fertility Care recently published a revision to the terms previously known as PGS/PGD. The tests themselves remain unchanged but the new definition further clarifies which test will be performed.

They are:

  • PGT for aneuploidies (PGT-A) – Previously PGS
  • PGT for monogenic/single gene defects (PGT-M) – Previously PGD
  • PGT for chromosomal structural rearrangements (PGT-SR) – Previously PGS for translocation

To learn more about PGS or PGD please click to continue to the specific page.

Preimplantation Genetic Screening

Preimplantation Genetic Diagnosis