Catherine, Princess of Wales, says she is still having preventative chemotherapy for cancer which was found after major abdominal surgery in January.
She says she is making good progress, but has “good days and bad days” on it.
“On those bad days you feel weak, tired and you have to give in to your body resting. But on the good days, when you feel stronger, you want to make the most of feeling well,” she said in a statement.
She thanked people for their continued understanding and for sharing their own cancer stories.
“I am learning how to be patient, especially with uncertainty,” she said, adding that she was listening to her body and allowing herself “much-needed time to heal”.