Does bipolar disorder run in families?

Diana Meeks
Diana Meeks on behalf of Sigma Nursing
Family Practitioner

Scientists have found a higher occurrence of bipolar disorder in relatives of others with bipolar disorder. This has led to a search for a bipolar disorder gene. There does, however, seem to be other factors at play because identical twins do not always develop bipolar disorder if the other twin does. Since identical twins have all of the same genes, they would develop the disorder if it were entirely genetic.

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