A normal embryo cell contains 46 chromosomes, including the sex chromosomes X and Y. These normal embryos are called euploid. When an embryo forms with cells that have an extra or missing chromosome, this is called aneuploidy. There is now clinical evidence that abnormal aneuploid embryos, which can look morphologically normal, have a 96% chance of NOT implanting1.
It’s therefore important to identify and ONLY transfer euploid embryos to improve chances of a successful IVF cycle.
As this graph shows, the incidence of embryo aneuploidy increases with age. This is a major reason for the decreasing expectation of live birth per treatment cycle associated with increasing maternal age2.