When PGD is used to dismiss the embryos that have inherited a recessive genetic disease, there is a 75 percent chance that we obtain healthy embryos, although some of them will still be carriers of the disease.
However, this percentage diminishes to a large extent when PGD is combined with HLA typing, as the chances of finding embryos that are histocompatible with the HLA system of the older brother are 25%.
To sum up, the combination of PGD + HLA typing has a 19% chance of success.
Read the full article on: What Are Savior Siblings & How Are They Created? – Cases & Ethics ( 72).
By Zaira Salvador B.Sc., M.Sc. (embryologist) and Sandra Fernández B.A., M.A. (fertility counselor).
Last Update: 07/25/2018
