10 Causes of Schizophrenia
Cause #2: Being a Twin
Much of the evidence that has been accrued regarding the connection between schizophrenia and genetics is a result of studies performed on twins. Since twins have the same genetic makeup, they are good subjects to evaluate the effect genes have on the development of schizophrenia.
Research has shown that if one twin in a set of identical twins develops schizophrenia, the other one has a fifty percent chance of developing the condition. This is true regardless of environmental factors – even if they are raised separately, the chance is still the same. In non-identical twins, the chance of the other twin getting schizophrenia is about one in seven.
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