When the parents are also first cousins

New evidence suggests offspring are more likely to have mental health problems

Children of first cousins are more likely to be depressed or suffer psychosis than children of non-related parents, research shows.

kissing cousins

While it is well known that the progeny of consanguineous couples are at elevated risk for a wide range of medical problems, it has only now been demonstrated that they are also at risk of serious common psychiatric disorders.

A long-term observational study of almost 364,000 people born in Northern Ireland between 1971 and 1986 has found that adult offspring of first-cousin parents are more

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