This technique enables certain genetic abnormalities in embryos to be detected.
Why? : We discriminate between testing for Aneuploidi -PGT-A (an abnormal number of chormosomes, like in Mongolism-trisomie 21), for Monogenic Diseases PGT-M (as for mucoviscidosis ; a sinle gene mutation can cause this), and for Structural Rearangements (such as is the case in carriers from a translocation)
Technical details : A biopsie of one or more cells is taken from a viable embryo on the day 3 or day 5 stage, depending on the situation. Mostly these embryo's will be frozen at the day 5 stage. This will give the genetic lab the time to run their test on them. Only the normal embryo's will be transferred in a subsequent cycle called thawing cycle.
Practical info : for the application of this technique, an appointment is made at the medical genetics centre of Leuven university hospital.