A woman who allegedly sold fake ultrasound images to expectant mothers has been charged with breaching Australian Consumer Law.

The ABC revealed in January that scores of women realised they had received identical ultrasound images from the business, after sharing photos of their scans on Facebook.

WA's consumer watchdog said the Bunbury-based business "Amazing 4D Imaging" is facing multiple charges of making false and misleading representations to consumers.

The Department of Commerce received more than 75 official complaints.

"We had an unprecedented 76 actual written complaints in relation to that issue," Consumer Protection's Debbie Butler said.

The department had to send three extra staff members to the Bunbury office to work through the influx of complaints, she said.

"That was huge for us and that's culminated in charges having been laid for false and misleading representation," Ms Butler said.

The matter will go before the Bunbury Magistrates Court on January 12.