Fallon Fox, a professional mixed martial arts fighter, has come out transgender.

Fox, 37, is the first female transgender fighter in mixed martial arts history, Sports Illustrated reported.

“For years I've known at some point it's very likely the shoe would drop,” Fox told Outsports. “Maybe someone would guess that I'm trans. Maybe they would know me from my life before I transitioned. I've been waiting for that phone call to happen. And Saturday night, it happened.”

Fox is referring to questions about her gender posed by a reporter to her and a former trainer.

“These past six years, people have seen me as a woman, not a transsexual. People in the gym, people I train with, it's been great, it's been awesome. I'm just a woman to them. I don't want that to go away. It's unfortunate that it has to.”

Fox said her parents reacted negatively when she told them she was transgender 10 years ago. They sent her to a therapist who attempted to convince Fox that she was a gay man, with the aim of turning her into a straight man. Today, Fox has little contact with her parents.

Fox underwent gender reassignment surgery in 2006.

She won her second professional bout over the weekend at Championship Fighting Alliance 10 in Coral Gables, Florida.