Fit mom and Instagram guru Chontel Duncan has revealed that her rock-hard abs actually made giving birth harder.

The Australia-based personal trainer first made headlines for rocking a full set of abs during her pregnancy— but the 27-year-old has now confessed that her well-honed tum did cause complications.

On her Instagram, she shared a snap of her caesarean section scar, as well as the caption: “They struggled to rip Jeremiah from my tummy as my abs locked him in super tight as I began vomiting during the operation.

“This is why my scar was cut up on my right side because the surgeon had to cut me further and use forceps to successfully get Jeremiah out.

“Perhaps a down side to a strong core.”

Chontel gave birth her son Jeremiah in March, via an emergency C-section.

Click for more from the Sun.