Preimplantation genetic diagnosis
Using preimplantation genetic diagnosis (PGD), embryos suspected of genetic abnormalities are examined prior to transfer and only normal embryos are placed into the uterus. PGD is performed as a part of an in vitro fertilization cycle.
PGD helps reduce the incidence of genetic disease in some couples. Many genetic diseases are sex-linked, meaning they can only be transferred to a child of a particular gender. Hemophilia is an example of a sex-linked disease that is transferred to male children. In cases where the risk of transferring hemophilia is present, using PGD only female embryos will be transferred to the uterus thus eliminating the chance for hemophilia in the child.
Learn more at the Center for Human Reproduction.