Preimplantation Genetic Testing (PGT)

(Preimplantation Genetic Testing) is one of the major advances in assisted reproduction techniques in recent years.

It is a technique that makes it possible to avoid, as far as possible, the transfer of embryos that may present chromosomal abnormalities or inherit known genetic diseases from the parents.

It consists of the genetic study of embryos before they are transferred to the woman’s uterus, to minimize the risk of having a sick child.

Who is it indicated for?

PGT is indicated for patients who are carriers of monogenic diseases, translocations, inversions, or other chromosomal abnormalities; also for patients with advanced maternal age, a previous history of spontaneous abortions, or implantation failure.

How is Preimplantation Genetic Testing performed?

Once the embryos have been obtained, the next step is to perform a cell biopsy. This procedure is performed on day 5 or 6 of embryonic development, when the embryo has reached the blastocyst stage and has approximately 100 cells. A sample of the trophectoderm, the cells that form the outer layer of the embryo, is extracted. Once biopsied, the blastocysts are vitrified while awaiting the results of the genetic test.