Sharing her experience in a recent video on TikTok, the dark-haired stunner explained that the barely-there bump was the reason she didn't take any maternity snaps.

In the now-viral video, which has been viewed more than 4million times, the gorgeous mum was seen rocking figure-hugging leggings, teeny short, crop tops and mini skirt, all in the months leading up to her son's birth.

The young mum, who have birth to her son last year at the age of 22, said the reason she never showed was because she had a “big uterus” and was carrying in her back.

The stylish mum has bravely opened up about her pregnancy journey, which started with losing ''about 15 pounds'' in the first three months, as she was puking so much, Kidspot reported.

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However, as this was rather ''early on'', Nikki said that she didn't think much of it.

As time went by, there was still no signs of a baby bump, despite Nikki having “all the symptoms and felt kicks regularly”.

That looks better than I do not pregnant
Social media userTikTok

At around eight months, the young mum revealed she began ''to feel very heavy'' - but just like before, the was no big belly.

Looking back at the time - which she has since described as a ''crazy experience'' - Nikki claimed that ''even at the hospital'' nobody could tell she was carrying a baby.

But whilst many woman struggle with weight gain during pregnancy - which is totally normal - Nikki confessed it was difficult, as she'd always imagined having a big belly during pregnancy,

''One of the biggest reasons why I was sad having no bump,'' the young parent said, noting that she never had a maternity photoshoot.

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''It’s definitely upsetting not experiencing the bump.''

The video has recently taken the internet by storm, leaving many gobsmacked - and even jealous over her slim figure.

One advised: ''Consider yourself lucky.''

Someone else chimed in: ''Wow lucky!!!!! I still look 9-months pregnant and my child is 4.''

What factors can affect the size or shape of your bump?

The shape and size of your baby bump can vary depending on a lot of different factors, which can include:

Your height and frame – If you are short and relatively petite, your bump may look more prominent than if you're a taller and heavier mum.
Your core muscles – Yes, that pre-pregnancy six-pack can make a huge difference! Toned abdominal muscles can mean you don’t show as quickly as your tight core holds its shape for longer. In some cases, mums may also carry the baby higher once the bump appears. Your age and whether you’ve had a baby before can also affect your core muscles. However, it’s important to remember you don’t need super-defined abs belly to be considered healthy.
The position your baby is lying in – How the little one is positioned can affect the look and size of the bump.
How many babies you’re carrying – If you’re expecting twins, triplets or even more, your bump might expand to make more room for all of those on board.

''That looks better than I do not pregnant,'' someone else cried.

''This is so rare, but I get it! That bump is beautiful as well,'' a supportive user penned.

''I look 9 months pregnant and I've never even been pregnant,'' a fifth joked.

When the little one joined the family, the young mum shared a heart-warming photo of her son.