Meghan Markle's baby bump has prompted punters to put money behind the Duchess of Sussex having twins.
Sportsbet.com.au said the initial odds of Meghan and Prince Harry giving birth to a twin were sitting on NZ$23, but have since moved into NZ$14 on their site.
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Spokesperson Will Byrne said "punters have responded to Meghan's booming baby bump with a few punts placed on twins".
He said one punter even placed a dollar on quintuplets - a bet that would pay out NZ$1085.
The British royal family has not had twins for 588 years the last being born in the 15th Century, when Queen Joan of Scotland had twin boys.
Scientists predict only 2 percent of the world's population to be twins, with just 0.2 percent of the identical variety.
Bets on Meghan giving birth to a girl have attracted three times more money than a boy, and Diana is leading in the list of names, on NZ$9.76.
