Hundreds of people have made furious posts on Kmart Australia's Facebook page to which the store's team have responded and requested details via private message.
A spokesperson for Kmart told Daily Mail Australia that they 'sincerely apologize for this situation'.
'We were concerned to learn of our customer's experience and have asked her to contact us directly,' she said
'Kmart has an equal opportunity policy in place which clearly states that the business will not tolerate unlawful discrimination or harassment on the basis of pregnancy, potential pregnancy or breastfeeding and the features associated with these attributes.'