The Duchess of Cambridge Kate Middleton leaves a London hospital after being treated for acute morning sickness related to her pregnancy, Dec. 6, 2012. (Photo Source: icpress.cn)

Prince William and Kate Middleton leave the King Edward VII hospital in central London on December 6, 2012. (Photo Source: icpress.cn)

Prince William and Kate Middleton leave the King Edward VII hospital in central London on December 6, 2012. (Photo Source: icpress.cn)

Prince William and Kate Middleton leave the King Edward VII hospital in central London on December 6, 2012. (Photo Source: icpress.cn)