If you sleepwalk, there’s a good chance your children will as well.

A Montreal study adds support to the growing belief that behaviours such as sleepwalking and sleep terrors run in families.

Researchers say the offspring of parents who are or were sleepwalkers are between three and seven times more likely to sleepwalk than other children.

And, the likelihood rises if both parents have a history of sleepwalking.

It was found that in families with two parents who are or were sleepwalkers, nearly two-thirds of the children experienced sleepwalking incidents.

The findings, from the Centre for Advanced Research in Sleep Medicine at Sacre Coeur Hospital, a teaching hospital of the University of Montreal, are published in the journal JAMA Pediatrics.