A long-term, population-based study suggests that the persistence of conduct disorder beyond childhood is affected by prenatal and early childhood characteristics. Among 7,218 children with high levels of conduct problems, specific risk factors for continued problems in adolescence were maternal anxiety during pregnancy, cruelty to the mother by her partner during the child’s preschool years, harsh parenting, and under-controlled temperament in the child. The influences were similar in boys and girls. Barker and Maughan (p. 900) found that more than 60% of the children had only minimal conduct problems by age 13, emphasizing the importance of identifying the children most likely to have long-term conduct disorders.