Pulmonologist Are Holm at the National Hospital in Oslo says that Mette-Marit will instead be kept under observation during the day after her transplant, which took place in mid-June.
"It is not uncommon for complications to arise after a lung transplant. The Queen has had complications on a few occasions since the operation, including today," he said in a press release from the royal court.
Crown Princess Ingrid Alexandra will accompany King Haakon at the swearing-in. Queen Sonja and Prince Sverre Magnus will also be present.
Queen Mette-Marit was diagnosed with pulmonary fibrosis in 2018 and her health gradually deteriorated thereafter. In early June, it was announced that she had been put on the list of people in need of a lung transplant.
She left the hospital in mid-July. In connection with King Harald's death, she has appeared in public several times.
