We've been in awe of fitness model Chontel Duncan ever since she began documenting her pregnancy journey on Instagram, because, well, her six-pack never went away!

The workout queen is due to give birth at the end of the month and shared a photo of her baby bump next to one of her friends, who still has 12 weeks before she's due.

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"Happy, Healthy, baking, first time expecting mummy's, 12 weeks to go, 12 days to go, fit pregnancies!" she captioned the pic below.

She also shared a photo of them from behind and it's pretty much impossible to tell that either one is expecting.

"One of my incredibly inspiring clients Tegan who is 28 weeks pregnant. How cool is this Tegan has 12 weeks to go & I have 12 days to go!!" she captioned the pic.

Click through the gallery below to see photos of Chontel's rock-hard abs during her pregnancy.