It's a human - specific genetic disorder where there's an extra chromosome present. (smartdogowners.com)
Preimplantation Genetic Diagnosis (PGD) is a test used to screen for specific genetic disorders in IVF embryos prior to transfer and subsequent implantation. (fertilitynjny.com)
The procedure coincides with In - Vitro Fertilization (IVF) and uses only embryos analyzed as being free of a specific genetic disorder to be transferred for pregnancy. (vcrmed.com)