Scientists may know why many mothers and children have birthdays in same month

Mothers and children have their birthday in the same month more often than thought, a study suggests (Dominic Lipinski/PA)
Scientists believe they may have the answer to why so many mothers share the same month of birth with their children.
An analysis of more than 10 million births in Spain and France has shown it is more common than previously thought for family members to have birthdays in the same month or during the same season.