Preimplantation genetic diagnosis (PGD) is a technique that allows scientists to screen embryos after fertilization through In Vitro Fertilization (IVF), to prevent the transmission of serious genetic diseases for couples who are at risk. It also can be used to screen the egg and sperm before fertilization occurs. Only unaffected embryos will be transferred to the uterus for implantation.


Image from Nature Reviews Genetics 3, 941-955 (December 2002)

While this technology offers the hope to increase the success of IVF, it does raise some concerns about choosing a child in order to meet the needs and desires of parents. While most cases seem to have More >