And that lack of spotting is why scouting for them for athletics has proven effective - they will be there with their female birth certificates qualifying them for athletics. A UK 5-ARD individual is unlikely to have been assigned female at birth like Semenya was.
(And this is finally a correct usage of "assigned" - Semenya is male, but was assigned female at birth. "Assigned" is not synonymous with actual sex).
Recognising the context is important:
2009 Daily Mail
'She wouldn't wear dresses and sounds like a man on the phone': Caster Semenya's father on his sex-riddle daughter
(extract)
"Like countless South African men, Jacob Semenya works and lives away from home, returning to his family only once a month to give them his wages. Caster and the rest of his children grew up in the village of Fairlie, deep in South Africa's northern Limpopo province.
Built on a remote African plain and accessed by a single dirt road, most people work as farmers and labourers. The Zion Christian Church dominated life for Caster, her mother Dorcus Semenya, her three sisters and brother.
When Semenya was born in 1991, her father was so determined to earn enough to look after her that he worked away from home for weeks. With three daughters, Jacob had desperately wanted a son.
He got a girl - albeit one with many of the characteristics of a boy. 'When I was told it was a girl, I did not mind. I was just very proud to have another child. I was not allowed to check the baby's gender for myself. That's the job of the elderly women, who then make a pronouncement.
'In our culture, the father is not allowed to even touch his baby until the umbilical cord has fallen off. Then the old women of the village take it away and the man is handed his child. This week, I thought of how tiny she once was. I still feel very protective of her.' (continues)
www.dailymail.co.uk/news/article-1208227/She-wouldnt-wear-dresses-sounds-like-man-phone-Caster-Semenyas-father-sex-riddle-daughter.html