Repeated early-life exposure to inter-parental conflict increases risk of preadolescent mental health problems.

Children are sensitive to inter-parental conflict, with long-term negative effects for child mental health even when reported at one time point within the first 6 years of life. What is Known: • Studies of children born prior to 1990 show that children exposed to verbal conflict or severe forms of family violence are at greater risk of mental health problems. What is New: • Physical and verbal inter-parental conflict reported once or at multiple time points over the first 6 years of life was associated with externalizing and internalizing problems reported by mothers, fathers, children, and teachers. • Associations between inter-parental conflict and child problems were not explained by family social risk, maternal mental health, or parenting.