Kate’s was low and seemed to poke out of her Catherine Walker coat, while Zara’s seemed to be spread widthways across her middle.
We’re speaking, of course, about the baby bumps of The Duchess of Cambridge and Zara Tindall, on glorious display at the Easter service at St George’s Chapel in Windsor on Sunday.
Indeed, no one had eyes for anything except the two bumps, each different in shape, but equally eye-catching.
Zara’s bump is spread out around her middle and hips, a tell-tale sign she is carrying a girl. Kate, on the other hand, has a bump which stick out like a netball, indicating it’s a boy
Observers could not help but compare the two. But what is fascinating is what the shape of the bumps can signify. Can we tell the sex of a baby from this?
And why is it some bumps barely show while others proclaim themselves so loudly?
Here we take a look at some of the most prominent royal baby bumps over the years.
A netball’s a boy, a wide bump’s a girl
Is Kate expecting a boy?
It’s said if a woman has a bump that sticks out in front like a netball, it’s a boy — and Kate’s bump fits the description to a T.
This could be because boys are, on average, larger when they’re born than girls (and therefore the bump may be slightly more pronounced).
Shape on top can also be a predictor — women carrying girls develop larger breasts during pregnancy than women carrying boys (their bust increases by an average of 8cm compared with 6.3cm) as male foetuses require more energy from their mother, causing her to grow less
Sophie Wessex displayed the classic girl bump at eight months pregnant with her daughter (left) and a rounder netball shape when seven months pregnant with her son (right)
There’s another reason Kate might be more likely to be having a boy — because William has a brother.
Corry Gellatly, a research scientist at Newcastle University, analysed 927 family trees and found men with brothers are more likely to have sons, while men with sisters are more likely to have daughters.
This pattern is found in men but not in women.
Zara, on the other hand, is displaying all the tell-tale signs of a woman who is carrying a girl.
According to perceived wisdom, if it’s a girl, the weight is spread out around an expectant mother’s middle and hips — and Zara’s bump appears to be spread more widthways than poking out to the front.
Pictured here on Sunday, Zara, who is believed to be around six months pregnant, has a similar bump to when she was carrying her daughter, Mia, in 2013 (below).
This theory also works with Sophie Wessex who displayed the classic girl bump at eight months pregnant with her daughter, Lady Louise, in October 2003 — her bump full and wide across her waist and hips.
Seven months pregnant with James, Viscount Severn, in October 2007, Sophie’s bump is the rounder, ‘netball’ shape.
Sizes that show if it’s number one, two or three
Kate is due to give birth within the next few weeks and, while you would expect her bump to be big, it does seem larger than the bumps of her previous pregnancies at the same stage.
Research has shown that a woman’s bump is considerably smaller for her first baby than subsequent pregnancies.
That’s because when a woman becomes pregnant, her levels of the female hormone progesterone increase.
The Duchess of Cambridge while pregnant with George (left) and Charlotte (right)
This causes bloating and may make the stomach swell before the womb itself has increased in size. In second and third pregnancies, this happens more quickly and the bump gets bigger.
Kate’s bump with Prince George, her first child, born in 2013, was smaller and neater.
Also a swelling uterus causes abdominal muscles and ligaments to stretch, and though these constrict again after the birth, they will never regain their pre-pregancy tautness.
Kate’s current bump does seem larger than the bumps of her previous pregnancies at the same stage
When she was carrying Charlotte, the bump was slightly bigger — and her third bump is bigger still.
This does not necessarily mean she is carrying a big baby, however.
‘The bump of a 10lb baby can look smaller than that of a 6lb baby, depending on the shape of the mother’s body,’ says Sarah Fox, policy adviser at the