Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)

Duchess Of Cambridge Leaves The King Edwards VII Hospital

LONDON, ENGLAND - DECEMBER 06: The Duchess of Cambridge, Catherine Middleton and Prince William, Duke of Cambridge leave the King Edward VII hospital where she has been treated for hyperemesis gravidarum, extreme morning sickness at King Edward VII Hospital on December 6, 2012 in London, England. (Photo by Fred Duval/Getty Images)