
Keeping with tradition: Catherine's baby plans —
On June 21, 1982, almost 31 years ago, Prince William was born. Prince Charles and Princess Diana are shown leaving the Lindo Wing, at St. Mary's Hospital in London. Catherine, the Duchess of Cambridge, plans to give birth to her baby at the same hospital.

Keeping with tradition: Catherine's baby plans —
On display at the main gates of Buckingham Palace in London is the announcement that Diana gave birth to a son, William, at 9.03 p.m. on June 21, 1982. Charles was with her at St. Mary's Hospital for the birth of their first child, who weighed 7lbs 1.5 ozs and had blue eyes.
Keeping with tradition: Catherine's baby plans —
Charles and Diana are photographed on September 16, 1984, following the birth of their second son, Prince Harry, at St. Mary's Hospital.

Keeping with tradition: Catherine's baby plans —
Catherine attends a garden party in the grounds of Buckingham Palace hosted by Queen Elizabeth II on May 22, 2013.

Keeping with tradition: Catherine's baby plans —
William and Catherine arrive for a service of celebration to mark the 60th anniversary of Queen Elizabeth II's coronation at Westminster Abbey on June 4, 2013.

Keeping with tradition: Catherine's baby plans —
President and CEO of Princess Cruises Alan Buckelew escorts Catherine stands next to an image taken of herself by Getty photographer Chris Jackson after a ship's naming ceremony at Ocean Terminal on June 13, 2013 in Southampton. This was Catherine's final public appearance before she gives birth.

Keeping with tradition: Catherine's baby plans —
Catherine is photographed on the balcony of Buckingham Palace during the annual Trooping the Color Ceremony on June 15, 2013 in London.