The Duchess of Cambridge has cancelled a number of public engagements over the next few days and it is not known when she will next be seen in public.
Royal Correspondent Tim Ewart says she is expected to attend The Hobbit premiere next Wednesday and it is an event that she is unlikely to want to miss.
The Duchess of Cambridge left hospital today, after three days of treatment for a severe form of morning sickness.
A nurse disclosed information about Kate's condition to two DJs who rang the hospital claiming to be the Queen and Prince Charles.
The Duchess of Cambridge is to spend another night in hospital being treated for acute morning sickness but is said to be feeling better.