A doctor has staunchly argued that there is no current evidence that transgender girls perform better in sports than cisgender girls after Caitlyn Jenner's controversial remarks.
Jenner, who is running for governor in the state of California, sparked huge backlash recently after insisting that transgender athletes who were born as men should not be allowed to compete in girls' sports teams.
Alabama, Mississippi, Tennessee and Kansas are among the US states to have banned transgender girls from competing in girls' sports.
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However, Dr Veronica Ivy has now claimed that the data available doesn't show any clear signs that a transgender girl would hold a significant advantage over a cisgender girl in sports.
Dr Ivy told TMZ: "The truth is, we don't know [what makes men better at sports compared to women].
"But we do know now, finally, after all these years, that it isn't as simple as natural testosterone.
"That is not the reason. There are elite world championship level men with natural testosterone below the women's average, and they're competing at no disadvantage to men with 100 times as much testosterone.
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"So, there are certainly, maybe, some biological reasons for men, on average, being bigger, stronger, faster than women, but we do know that there are also social reasons."
Dr Ivy believes that transgender athletes should be allowed to compete with cisgender girls until there is research that presents a strong case against the idea.
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The 38-year-old trans rights activist added that competition in sports is a 'human right' as she pointed out the difference between trans girls and cisgender girls over boys and girls competing.
"If we're talking about trans girls in girls' sport, then we have to talk about the difference between trans girls and cisgender girls -- not boys and girls," Dr Ivy said.
One US news anchor, meanwhile, has been praised on social media after she called out West Virginia Governor Jim Justice over signing the bill to ban transgender girls from competing on women's sports teams in schools.
Featured Image Credit: TMZ