Pre-Implantation Genetic Screening (PGS)
Preimplantation genetic screening (PGS) is a technique that allows us to check that the chromosomes of an embryo are normal, prior to transfer of the embryo into the uterus. To be able to check the cells of the embryo, we need to conduct IVF and grow the embryos in the incubator for 5 days. A day 5 embryo consists of around 100 cells, the highly skilled embryologists at Genea are then able to biopsy a few of these cells from the embryo without damaging it. The embryo is then frozen whilst analysis of the biopsied cells takes place.
An embryo having an incorrect chromosomal complement is the most common cause of miscarriage or, in women over 35 years of age, the most common cause of failed implantation. Incorrect numbers of chromosomes are also the cause of conditions including Down syndrome, Edward syndrome and Patau syndrome. By checking the chromosomes of an embryo prior to embryo transfer, we can ensure that only embryos with a normal chromosomal complement are transferred.