The Duchess of Cambridge was forced to pull out of another official engagement today (Wednesday, October 1) due to suffering from hypermesis gravidarum.
Kate – who is pregnant with her second baby – was due to attend an engagement at The Art Room, a charity of which she is patron.
She was unable to attend due to her ongoing Hyperemesis Gravidarum - a very extreme case of morning sickness - which she also suffered from when she was pregnant with Prince George.
Clarence House announced Kate would not be attending with the tweet:
The Duchess of Cambridge was unable to attend today's @TheArtRoomUK engagement as she continues to suffer from Hyperemesis Gravidarum (1/2)
- Clarence House (@ClarenceHouse) October 1, 2014
In a follow-up statement, Kensington Palace said "The Duchess of Cambridge continues to suffer from the effects of Hyperemesis Gravidarum and was unable to attend this event today in person.
"The decision to undertake engagements is being kept under review on a case by case basis."
The Duchess then released a public message to The Art Room, expressing her sadness at having to pull out of the day.
Kate is believed to still be in the early stages of her second pregnancy – and has not yet reached the 12 week mark.
The Duke and Duchess were forced to announce their news early because Kate was unable to attend an event in Oxford with William. She then pulled out of her first solo trip abroad to Malta.
Kate's continuing absence from official duties comes as bookies suspended the odds on the couple expecting twins (girls to be called Elizabeth and Margaret, naturally), due to a flurry of bets.
Speaking about the bets, William Hill spokesperson Rupert Adams said: "We have had a load of unexpected bets including a large number of new accounts - with any other market I would say that people know."
Below is Kate's message to The Art Room in full:
"I wanted to share my congratulations with you all for the launch of the new Clore Art Room. I was looking forward to joining you all for this particularly special day as part of The Clore Duffield Foundation's 50th Anniversary year.
"I am truly sorry that I cannot be with you all today as you celebrate this milestone. As Patron of The Art Room I feel great pride to see the work that the charity is doing. Vulnerable children flourish in the safe havens that The Art Room provides; this highlights just how important it is to support children at a time when they most need help and support.
"This partnership with The Clore Duffield Foundation is a significant moment for The Art Room. As I cannot thank the Foundation in person today, I would like to extend my thanks to Dame Vivien and her Foundation for supporting a cause so close to my heart, and making such a transformational facility available to the children of Barlby Primary School.
"It really is hugely exciting to look to a future with even more Art Rooms, where the lives of many more challenging and vulnerable children will be transformed. I hope that you have a wonderful afternoon. My sincere apologies for not being able to join you but I hope that I will have an opportunity to visit Barlby and see the Clore Art Room soon."