The Duchess was back to business the following day, taking her bump out for a spin to visit Reach Academy with children's mental health charity Place2Be.
Kate joined delegates during a coffee break at the event in east London, run by the Anna Freud National Centre for Children and Families (AFNCCF), a mental health charity she supports as patron.
Crowd pleaser Kate spent time in the nursery section of the school
Click through for a visual rundown of the most recent outfits worn by longtime royal favorites including Kate Middleton and Queen Letizia of Spain, as well as new-generation trendsetters such as Princess Olympia.
Bear has just completed his training to become a therapy dog, and will be used at Reach Academy Feltham to support students emotionally and help them learn how to read.
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The 36-year-old took her time heading into the school, stopping to chat to the waiting students lined up outside to greet the royal visitor.
She also visited the nursery section of the school, which teaches pupils all the way through to sixth form, helping children paint and make pigs out of paper plates and marshmallows. Kate wore a green floral print dress by maternity brand Seraphine and it is one of her go-to's!
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At the school, the children began their day by singing in front of the royal, who said she was "very impressed with the singing" and "I wish every morning could start off like that".
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My belief is that we will do what we have to do. "We still have some weeks to go, and have to keep working to try to do our best". For me, it is obvious. "It is not a team at the bottom that will come here and say, "We are relegated" and that is it".