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The Brazilian star, 32, beat Felicia Spencer to defend her UFC women's featherweight title at UFC 250.
She's likely to sit out the rest of the year due to the impending birth of her first child.
However, Nunes may not return to the Octagon after dropping a huge hint on her glittering career.
"Ah, I don't know, I've achieved everything I wanted," she explained.
"I'm well, I can go on with my life, maybe a [take] new step, maybe find new talents, help some girls there... maybe be a coach, too.
"I'm in a moment that I can retire, you know, and I'm in a moment that I can fight. I'm fine. There's nothing else to be done right now in the division. The Hall of Fame will come, for sure. My life going forward, if I do stop now, the UFC will give me every support I need to continue having my money and work."
Nunes' shock revelation regarding her future comes off the back of Henry Cejudo, Jon Jones and Conor McGregor walking away from the UFC.
Former UFC double champion Cejudo retired immediately after beating Dominick Cruz at UFC 249 while Jones vacated his light-heavyweight title after a pay dispute with White.
As for McGregor, he penned a retirement tweet on social media following UFC 250.
Nunes' retirement claim will worry White, who recently said 'The Lioness' doesn't get the credit she deserves because she's a woman.
"I think it's because she's a woman, to be honest with you," the UFC president said.
"First of all, let's start here. Most of these guys that cover the sport don't know sh*t about the sport, anyways. Half of these guys have never been in a fight in their life. Not even half - 99.9 percent of them have never been in a fight in their life, and the .1 percent got beat up a few times. That's about it."
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