Mobile phone use linked to behavioural problems in children By David Thomas Last Updated: 12:06AM BST 19/05/2008 The children of mothers who use mobile phones while pregnant are more likely to develop behavioural problems, new research suggests. A study of more than 13,000 children in Denmark claims to show a link between use of handheld telephones by pregnant women and problems such as hyperactivity in their children. The risks are increased if the child then uses a mobile themselves before the age of seven, according to the report to be published in the journal Epidemiology. The study raises renewed questions...