What Is Williams Syndrome?
2. Causes
The cause of Williams syndrome is the absence of certain genes. As mentioned, the patient is born with the condition, and it cannot be acquired later in life. It is usually the result of a random disorder, but it is inherited from parents in very a small number of cases.
In most cases, the genes are missing in the egg or the sperm before the egg is fertilized. The fetus will then go on to develop and grow without the fetus. If somebody who has the syndrome wants to have children, there is a 50% chance it will be passed on to their offspring.
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