Catherine, Duchess of Cambridge
Kate Middleton is pictured arriving at the Cridge Centre for the Family on Oct. 1, 2016 in Victoria, Canada. Getty Images

Rumors have been rampant in recent days suggesting that Kate Middleton could be pregnant with her fourth child, and things were not quelled during the Duchess of Cambridge’s recent engagement at the Sunshine House Children and Young People’s Health and Development Centre.

The Duchess, who stunned in a polka dot blouse at the event, was set to speak to first-time moms at the event who have received help from the Family Nurse Partnership, as well as the Southwark Family Nurse Partnership team. The borough of Southwark gets the initiative there through the Children’s hospital Evelina London, which Middleton is a patron there.

According to Express UK, the Duchess may have once again exhibited broody kinds of behavior, as she commented on how quickly children grow up, noting with astonishment that her eldest son, Prince George, was already six-years-old. The comment comes as she has fueled pregnancy rumors due to her recently changing up her hair.

“I have two clues that make me think Kate is pregnant. We would love to see that confirmed,” royal expert Aranzuu Santos Lopez said. “What are those clues? Look at the recent images of the return to school day. Look at Kate’s hair. It has a different air. Highlights or new color, we don’t know yet, but it’s lighter, like a dark blonde. Every time the Duchess of Cambridge changes her look, she announces that she is pregnant within a few days.”

As rumors have continued to churn about an expected announcement, betting odds have also been slashed. While they were as low as 1 /2 earlier, Alex Apati of Ladbrokes told Express that the numbers have now been slashed to just 1 /4 on the Duchess having another child before the end of 2020.

“Royal fans reckon Kate is giving away signs that she could be pregnant with the odds continuing to shorten, it won’t be long before we suspend betting,” he said.