A mother's heartfelt and humorous message of support for her child's gender choice has gone viral after she took out a classified advertisement in a Queensland paper to retract the birth of her daughter and celebrate her new son.

Yolanda Bogert of Jimboomba, a suburb in Brisbane's south-west, published a light-hearted birth retraction in The Courier Mail's births section on December 2 which said: "In 1995 we announced the arrival of our sprogget, Elizabeth Anne, as a daughter. He informs us that we were mistaken. Oops! Our bad. We would now like to present, our wonderful son - Kai Bogert. Loving you is the easiest thing in the world. Tidy your room."

The ad placed in the Courier-Mail.

Kai was known as Elizabeth Anne for the past 19 years but told his mother a few days ago that he no longer wanted to live as a girl.

Ms Bogert told The Courier Mail she had always known there was something different about Kai; there had been some small signs when he was younger and then more evident signs in later years, but they had never really been discussed openly.