In pictures: The Duchess of Cambridge's pregnancy

William and Kate leave the King Edward VII hospital in London on December 6 2012 after she was admitted with severe morning sickness. Credit: Andrew Matthews/PA Wire

The Duchess of Cambridge made a handful of public appearances in the early days of her pregnancy as she battled severe morning sickness, but in her middle trimester Kate carried out a number of engagements, appearing happy and healthy as she approached the arrival of her first baby.

In the six and a half months following the announcement of her pregnancy in December 2012, Kate carried out 19 days of public engagements before going on maternity leave in the middle of June.

Here's a look back at Kate's journey since it became public knowledge that a royal baby was on its way:

Kate makes her next public appearance presenting the BBC's Sports Personality of the Year award to Bradley Wiggins on December 16. Credit: David Davies/PA Wire
Kate views a portrait of herself by Paul Emsley at the National Portrait Gallery on January 11 2013. Credit: John Stillwell/PA Wire
Kate visits the kitchens at Hope House residential centre, run by Action on Addiction for recovering addicts, on February 19 1013. Credit: Mary Turner/The Times/PA Wire
The Duchess of Cambridge is greeted by children from Havelock Academy, Grimsby, during her visit to the town on March 5 2013. Credit: Lynne Cameron/PA Wire
Kate visits the 1st Battalion Irish Guards to attend the St. Patrick's Day Parade at Mons Barracks, Aldershot, on March 17 2013. Credit: Toby Melville/PA Wire
The Duchess of Cambridge is given a Baby on Board during a visit to Baker Street Tube Station on March 20 103. Credit: Chris Radburn/PA Wire
The Duke and Duchess of Cambridge arrive for a visit to BAE Systems in Barrow-in-Furness, Cumbria, on April 4 2013. Credit: Chris Jackson/PA Wire
Kate with Chief Scout Bear Grylls (right) as she attends a Scouts event at Windsor Castle on April 21 2013. Credit: Ben Gurr/The Times/PA Wire
The young royals raise their wands on a Harry Potter set during their visit to Warner Bros studios on April 26 1013. Credit: Chris Jackson/PA Wire
Kate visits Naomi House Children's Hospice in Winchester, Hampshire, during Children's Hospice Week on April 29 2013. Credit: Steve Parsons/PA Wire
The Prince of Wales, the Duchess of Cornwall and Duchess of Cambridge attend a Garden Party at Buckingham Palace on May 22 2013. Credit: John Stillwell/PA Wire
William and Kate attend a service at Westminster Abbey to mark the 60th anniversary of the Queen's coronation on June 4 2013. Credit: Jack Hill/The Times/PA Wire
Kate tours the Royal Princess after the Princess Cruises ship naming ceremony at Ocean Terminal, Southampton, on June 13 2013. Credit: Chris Jackson/PA Wire
The Duchess of Cambridge makes her final public appearance before the birth at the annual Trooping the Colour parade on June 15 2013. Credit: Dominic Lipinski/PA Wire