June 4, 1982: Princess Diana arrives at the Guards Polo Club grounds to watch Prince Charles play a polo match.
Princess Diana Rare Original Press Photo Tim Graham Pregnant with Harry May 84
May 14, 1984: Princess Diana at the banquet at the Royal Academy of Arts at Burlington House, Piccadilly.
June 12, 1984: Princess Diana at a photocall in the garden of Kensington Palace, London.
Princess Diana sleeping at a concert - later they announced that she was pregnant with Prince William
Rare press photo of a pregnant Princess Diana with Elizabeth Taylor
17 June 1982 Princess Diana only attended Ascot once this season
May 14, 1984: Princess Diana attending a banquet at the Royal Society of Arts in Piccadilly, London.
June 28, 1984: Princess Diana at a polo match, Cirencester, Gloucestershire.
Princess Diana pregnant with Prince Harry in 1984 | heatworld.com