What Turophilic said.
Reminder that there are
130 babies needing specialist input every year at birth… For most babies with a DSD diagnosis sex assignment will be clear. In about 7 or 8 babies annually this is not the case.
https://archive2021.parliament.scot/S5_European/Inquiries/CensusBill_DSDFamilies_CTEEAS518CB33.pdf
Other matters aside, it would have to be confirmed VSD, not self-asserted and self-diagnosed which seems to be extraordinarily common. I've never forgotten reading about Ela Xora. I have to admire the bravado of the non-falsifiability of Xora's position despite a chromosomal test that contradicted the self-diagnosis but nonetheless still reinforced personal cognitive biases.
"That mask is a potent symbol of her struggle to rip apart preconceived notions of gender and gain recognition of her own gender identity--that biology is not black and white and that shades of gray should be celebrated, not denied.
Xora was raised as a boy and began presenting as a woman when she turned 25. For years, she believed that she had androgen insensitivity syndrome, or AIS, a condition that causes person who is genetically male, with XY chromosomes, to not respond to male hormones. She identified as intersex, and she thought she was lucky to escape to invasive, painful, and often lengthy surgical procedures that other intersex children undergo, a practice that the United Nations has recently denounced as "torture."
Early this year, chromosomal tests showed that Xora was mistaken—she does not have AIS. She says that this only adds to her belief that gender does not exist on a binary—and that neither trans nor intersex people should have the suffer for that."
https://archive.is/ARGbR
For sports, I can't see the justification. Did you have any particular VSD conditions in mind, OP?