PGT-A, or preimplantation genetic testing for aneuploidies, is a genetic test performed on embryos produced through IVF. PGT-A gives information about embryos’ genetic health to help your care team select the best embryo for transfer and improve your chance of achieving a successful pregnancy. PGT-A was formerly known as PGS, preimplantation genetic screening.
PGT-A works by looking at the amount of genetic material within IVF embryos. This genetic material is housed within structures called chromosomes. Chromosomes are very important for healthy growth and development.
Embryos with the incorrect number of chromosomes (also called aneuploid embryos) typically do not result in a successful pregnancy or may lead to the birth of a child with a genetic condition.
Embryos with the correct number of chromosomes (also called euploid embryos) have a better chance of leading to a successful pregnancy.
PGT-A identifies embryos with the correct number of chromosomes, so your care team can select the embryo with the best chance of leading to IVF success.
Comparison between normal and an abnormal number of chromosomes.