A KFC ad featuring two parents at a parent-teacher interview is under investigation by the Advertising Standards Board.

The original iteration of the ad showed the couple being shown a drawing by their child that showed them in some sort of sex act.

However, it has since been altered to show a drawing of daddy’s “fart trumpet”.

News Corp media has reported that the ad has received over 30 complaints.

KFC marketing bosses have defended the ad while the Advertising Standards Bureau assesses it, with the findings expected in the coming weeks.

The company’s chief marketing officer Angela Richards said: “KFC has strict review and approval processes in place to ensure all creative work adhere to relevant codes and standards,” said KFC’s chief marketing officer Angela Richards.

“In this case the Advertising Standards Bureau has decided that the advertisement and associated posts in question do not breach the AANA’s (Australian Association of National Advertisers) code of ethics.”