LONDON, ENGLAND - DECEMBER 04: Two Police Officers stand guard in the early morning at the King Edward VII Private Hospital on December 4, 2012 in London, England. Catherine, Duchess of Cambridge ... more 

LONDON, ENGLAND - DECEMBER 04: Two Police Officers stand guard in the early morning at the King Edward VII Private Hospital on December 4, 2012 in London, England. Catherine, Duchess of Cambridge spent her first night in the hospital after yesterday's announement of her pregnancy and the fact she was suffering from hyperemesis gravidarum or acute morning sickness. (Photo by Chris Jackson/Getty Images) less