LONDON, ENGLAND - MARCH 10: Catherine, Duchess of Cambridge smiles during her visit to St Thomas' Hospital with Prince William, Duke of Cambridge on March 10, 2016 in London, England. (Photo by Toby Melville - WPA Pool/Getty Images)
LONDON, ENGLAND - MARCH 10: Catherine, Duchess of Cambridge smiles during her visit to St Thomas' Hospital with Prince William, Duke of Cambridge on March 10, 2016 in London, England. (Photo by Toby Melville - WPA Pool/Getty Images)