A study of the impact of "boomerang fathers" -- those who cycle in and out of their children's lives -- yielded surprising results for researchers. "Boomerang fathering" provided a type of stability in a daughter's life that staved off her depressive symptoms compared to those adolescent girls whose fathers were completely absent.

The study, "Boomerang Fathers in Adolescent Female Depression," was published in the National Council on Family Relations, Journal of Marriage and Family.

"Previous research has suggested that stressful experiences, like family instability, father absence or stepfather presence, contribute to an adolescent experiencing depression," said Daphne Hernandez, University of Houston assistant professor and principal investigator. "This is not what happened in the cases of these youth. Boomerang fathering served as a protective factor for female adolescent depression compared to female adolescents who experienced instability, but not boomerang fathers."

Hernandez, of the Department of Health and Human Performance, worked with researchers from New York University and Iowa State University.

"We're finding a new way that families might support their children. Even though the family has gone through some really bad times, having the dad come back has proven to be positive," said Cassandra Dorius, an assistant professor of human development and family studies at Iowa State University.

Using data from the 1979 National Longitudinal Survey of Youth and the Young Adult files, researchers examined responses from nearly 4,000 youth who were 18 years old by the year 2010 and more than 3,300 mothers. A third of the daughters sampled had unstable father residential patterns -- they never lived with their biological father or they experienced boomerang fathering (father left the family, then returned to the same partner).

Among their findings:

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There was no real difference between adolescent depressive symptoms of girls who lived with their biological father from birth to 18 years of age and those with lived with boomerang fathers

Adolescent girls exposed to boomerang fathers had lower depressive symptoms at 18 years of age than those exposed to unstable, non-boomerang fathers