Kate Middleton is the mother to three children, Prince George, six, Princess Charlotte, four, and Prince Louis, one.
However, rumours are rife that Kate Middleton is pregnant again.
Claims that the royal has taken a doctor on her tour to Pakistan with her have fuelled the speculation.
Twitter users have been suggesting the Duchess of Cambridge is expecting again.
One wrote: “I wonder if Kate Middleton is pregnant again?!”
“So my wife said to me yesterday that she thought Kate Middleton ‘looked pregnant’. Today, the papers are reporting she may be but only because a doctor is accompanying her and William on tour. My wife's observations skills are dangerous. No wonder I can never hide crisp packets…” another said.
Hoping for double trouble, one wrote: “Is she or isn’t she preggy? I’ll be happy if she is.. Crossing my fingers that she’ll have twins-a double treat.”
And they might find their wishes fulfilled, as Ladbrokes have slashed the odds on Kate Middleton giving birth to twins next year.
The bookies make the Duchess of Cambridge 1/5 to give birth next year, but 4/1 now says she has twins.
Alex Apati of Ladbrokes said: "Punters are seemingly confident Kate is going to give birth next year, and plenty reckon we'll soon be welcoming royal twins into the world."
Ladbrokes Latest Betting
Kate Middleton to give birth in 2020 - 1/5
Kate Middleton to give birth to twins in 2020 - 4/1
Does Kate Middleton’s body language indicate she is pregnant?
Judi James told Express.co.uk: “None of (Kate’s) outfits so far seem to have made an concession for even the trace of a baby bump and knowing how badly she suffers with morning sickness when she is pregnant it would be very surprising if she did take on a tour as important as this during the early stages of a pregnancy.”
So, it seems the expert views a pregnancy as unlikely.
And, although Kate Middleton is often touching her midriff, the clue as to why may lie with William, rather than a fourth baby on the way.
“Kate is often seen touching her stomach area so this is a less reliable ‘tell’ than it might be