If you look at accounts from Semenya's early life there is evidence against his account of growing up as a girl. For example, there have been school photos published showing him wearing a boy's uniform near to a group of girls who were all wearing girl's uniforms. His former school headmaster, when interviewed years later, said he thought that Semenya was a boy and was very surprised to hear that he was now competing in women's athletics.

And of course he would have gone through male puberty, not female puberty. This would have been obvious then, and the result of this is obvious now if you see him in interviews. Male-typical build, male-typical vocal tone. Even his now-wife assumed (correctly) that he is male when she first met him.

Semenya has to double down on this narrative that he is a woman otherwise he will have to admit that his successful sporting career as a woman will have been a lie.