Our expert says:
It is not possible to detect any of the basic mental illnesses in the womb. a specialist could potentially calculate some sense of the risk, after taking a detailed family history ( because other family members with schizophrenia or related personality traits are relevant. I understand your concern. The great majority of children bron in families in which there is schizophrenia, are perfectly normal and remain so. All that happens when it may be hereditary is that the risk may be slightly higher than it would be in any other family ( in which there would still be some degree of risk ). The more family members have this ( and other disordrs ) the higher the risk, but it is always lower than you seem to be fearing. Maybe you can usefully discuss this with your brother's psychiatrist who will know most about the familty history and the nature of your brother's particular illness.
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