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Preimplantation genetic diagnosis.

Britain carefully controls which traits are screened, and regulators are coming under fire for allowing conditions that many people have learned to live with, often with great success.

One example is Marfan syndrome, a genetic disorder that affects connective tissue and the pulmonary system – and contributed to the long, lean look of U.S. icon Abraham Lincoln.

In fact, many famous and accomplished people, have suffered from a range of genetic disorders that modern embryo screening promises to eliminate. The list includes:

Henri de Toulouse-Lautrec: Pycnodysostosis, which results in brittle bones that break easily, short stature and abnormal bone growth, particularly of the limbs, skull and jaw

Stephen Hawking: Amyotrophic lateral sclerosis, also known as Lou Gehrig's disease

Stevie Wonder: Blind from infancy because of a destructive ocular disorder

John F. Kennedy: Asthma

Michael J. Fox: Parkinson's disease

Neil Young: Epilepsy

Edwin (Buzz) Aldrin Jr.: Bipolar disorder

Ernest Hemingway: Depression

Further reading on PGD

Canada's Assisted Human Reproduction Act (2004)

Health Canada

Health Canada's Assisted Human Reproduction Glossary

Genetics & Public Policy Center

Center for Genetics and Society

Link to in-depth article on PGD from

A report by the American Society for Reproductive Medicine: Sex Selection and Preimplantation genetic diagnosis

Jeff Steinberg's Fertility Institutes