An Australian boy who pleaded with his mother to allow him to make the transition into a girl has now had a change of heart two years later.

In 2015, Patrick Mitchell, then 12, began taking oestrogen hormones in a bid to become a female after a doctor diagnosed him with gender dysphoria.

People with the condition suffer distress as a result of a mismatch between their biological sex and gender identity.

'You wish you could just change everything about you, you just see any girl and you say I'd kill to be like that', Patrick told 60 Minutes' Ross Coulthart.

Scroll down for video

An Australian boy (pictured) who pleaded with his mother to allow him to make the transition into a girl has now had a change of heart two years later

In 2015, Patrick Mitchell, then 12, began taking oestrogen hormones and grew out his hair (pictured) in a bid to become a female after a doctor diagnosed him with gender dysphoria

His mother was fully supportive of her son and gave the go ahead for the transition after years of evidence suggesting it was the right choice.

'When he was young he would dress up in girls' clothes and at one stage he did say to me could he be taken to the doctor to be made into a girl', she said.

But after growing out his hair and the hormones taking control of his body by producing breasts, the unthinkable happened.

'He looked me in the eye and said "I'm just not sure that I am a girl"', his mother revealed.

After teachers began to call Patrick a girl, he questioned whether he had made the right decision.

'I began to realise I was actually comfortable in my body. Every day I just felt better,' he told Now To Love.

His mother (pictured) was fully supportive of her son and gave the go ahead for the transition after years of evidence suggesting it was the right choice

'When he was young he would dress up in girls' clothes (pictured) and at one stage he did say to me could he be taken to the doctor to be made into a girl' his mother revealed

In his bid to revert back to his original body, he has stopped taking his medication but there is uncertainty as to whether the changes are irreversible.

'Your boy's got breasts', Ross Coulthart reminded his mother.

Regardless of what lies ahead, his mother has commended her son's bravery for speaking out.

'That moment between parent and child when you know it's taken every drop of courage for that child to speak up… I didn't know what the coming days would bring, but I knew his thoughts had caught up with his body.'

Patrick's story is revealed in Channel 9's 60 Minutes to be aired at 8.30pm on Sunday.

But after taking hormonal medicines which developed breasts on his body, he has now had a change of heart and wishes to revert back to being a male

Ross Coulthart (pictured) queried whether it was possible to change back after stating: 'your boy's got breasts