The expert claimed the royal press office had been told to prepare for an announcement on the subject.
She looked as chic as ever but Crown Princess Mary appeared a little weary at times as she completed two days of royal duties in Denmark recently.
The 45-year-old Australian-born princess joined the Crown Prince Naruhito of Japan for a boat trip on his last day in the country on June 20.
Gunnevera showcased his potential with a win in March's Fountain of Youth Stakes, but he finished third to Always Dreaming and State of Honor in the Florida Derby.
Irish War Cry has won four of his five career starts, including a terrific showing in the Holy Bull Stakes to edge Gunnevera and Classic Empire.
Looking sophisticated in a sailor style ensemble - opting for a black Prada jacket and a black and white striped midi skirt - at one point the princess shielded her eyes from the glaring sun with her Prada sunglasses.
A day later, as she hosted a garden exhibition in Copenhagen, the princess briefly closed her eyes and put her hand to her head.
Post positions for the 2017 Kentucky Derby were drawn Wednesday morning at Churchill Downs in Louisville, Kentucky.
The 143rd running of the year's first Triple Crown race is set for Saturday evening at the famed track known for its picturesque twin spires.
The source told New Idea Princess Mary was ready for a new bundle of joy now that her youngest children are in school.'No one saw this coming!