Catherine, Duchess of Cambridge smiles and waves to crowds in Cambridge on November 28, 2012. (Photo by Chris Jackson/Getty Images)
LONDON -- The Duchess of Cambridge has left a London hospital where she was being treated for acute morning sickness related to her pregnancy.
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The former Kate Middleton smiled as she left the King Edward VII Hospital Thursday alongside her husband, Prince William.
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The couple's office said she would head to Kensington Palace in London for a period of rest.
Royal officials have said Kate is less than 12 weeks pregnant with her first child.