Marriage and Children of Divorce

I do not consider this breaking news, by any stretch, but Australian research confirms the high risk of marital breakdown faced by children of divorce:

The propensity toward divorce does not lie mainly in the genes, new research suggests.

An Australian study of twins and their grown children finds that family history plays a key role, however. Adults whose own parents had split had nearly twice the risk of going through a divorce themselves, the researchers found.

But there is no "gene" for divorce, so to speak, said lead researcher Brian M. D'Onofrio, an Indiana University psychologist. "Genetic factors that influence both generations do not [significantly] account for that increased risk," he said.

The findings are published in the August issue of the Journal of Marriage and Family.
Prior studies have found that a higher percentage of divorced people come from families split by divorce. That raised the question of whether genes, "could account for the increased risk of marital instability in offspring of divorce," D'Onofrio explained. His team is the first "to test out that possibility and, in large part, rule out the role of genetic factors," he said.

The research did not completely eliminate all genetic factors, however. According to D'Onofrio, about 66 percent of the increased risk for divorce appears to stem from the simple fact of a person's parents having been divorced. The remaining 34 percent of the risk seemed to be tied to genetic factors, as well as other factors affecting parents and children.

- Garry J. Wise, Toronto

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