What is Williams and Beuren syndrome ?

It is a genetic disease. A genetic disease corresponds to an alteration of the inheritance hereditary. This anomaly an sometimes be hereditary, which means it can be transmitted from generation to generation. In the Williams’ syndrome’s case, it is most of the time a genetic accident. For most of the cases, there isn’t any family antecedent; it is a disease that appears sporadically. Whatever your origins are, your sex is, you have one chance over 20 000 to have a child with this disease. This is why it is a very rare disease. However it represents 3.000 sick persons in France, and 300.000 in the world. The risk to have a child with the Williams’ syndrome is huge. Finally, the risk for the person that has the syndrome to have a child with the same problem is of 50%.