Telltale sign Kate and William could have fourth child

Allison Yee

There’s only a few months to go until their April due date, but it seems Kate Middleton and Prince William might already have expansion ideas when it comes to their brood.

Already parents to Prince George, four, and two-year-old Princess Charlotte, Kate is currently expecting the couple’s third child.

However one report claims the pair might already be making plans to add another little one to their busy little family.

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They're expecting their third, but a fourth baby could be in the pipeline. Photo: Getty

It’s been speculated that Kate always had plans to have three children to mimic her own upbringing, which saw her grow up alongside her brother James and sister Pippa.

But according to science, the sex of their newest arrival could be a huge factor in whether the royal couple decide to have another.

The Express cites a study that collected data on 6000 families to determine the likelihood of parents having another child after welcoming their third.

Prince William Kate Middleton George Charlotte

The couple already have their hands full with their two young children. Photo: Getty

“If the next royal baby is a little boy this puts Kate and William in the category of parents most likely to have another child,” explained the publication.

“Couples with two boys and one girl are 35 per cent more likely to have another child.”

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One factor that might put Kate off is the terrible morning sickness she's experienced with all three pregnancies. Photo: Getty

Another factor that might see Kate and Wills decide to fall pregnant again is the Queen.

Queen Elizabeth has four children with Prince Phillip - Prince Charles, Princess Anne, Prince Andrew and Prince Edward – and would no doubt love having her grandson William follow in her family footsteps.

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