BEACH shots depict her as every inch a curvaceous beauty queen. But 23-year-old Jenna Talackova was born male, and that led the Miss Universe Canada organisers to disqualify her last week as a finalist in the Miss Universe Canada pageant.
The rules of the contest, run by Donald Trump's firm, say entrants must be "naturally born" females.
The Vancouver woman underwent a sex change four years ago.
"She did not meet the requirements to compete despite having stated otherwise on her entry form," said a statement from Miss Universe Canada. "We do, however, respect her goals, determination and wish her the best."
The pageant's New York-based parent backed the decision.
"After review, organisers discovered that Jenna Talackova falsified her application and did not meet the necessary requirements to compete in the 2012 Miss Universe Canada pageant," a statement said.
The ban has won Miss Talackova widespread sympathy and raised the question of whether the pageant has the right to decide who is female.
Her change of gender was hardly a secret before the event because she had competed in the 2010 Tiffany Miss International Queen Competition for transgendered and transsexual women in Pattaya, Thailand.
In an interview for that pageant, she said she had lived her life as a female since age four, began hormone therapy at 14 and changed sex at 19. "I regard myself as a woman with a history," she said.
Connie McNaughton, Miss World Canada in 1984 and first runner-up for the world crown, called the decision outdated and discriminatory.
Some countries have their candidates undergo cosmetic surgery, she said, so what's wrong with sex-change surgery "because in your heart and soul you believe yourself to be a woman?"
A Vancouver transgendered activist, Jamie Lee Hamilton, said Miss Talackova could sue for violation of her human rights.
"She was born with male genitalia and is being treated as a second-class citizen," Hamilton said. "Under the eyes of the law and the medical profession, she's a legal female."