Women’s teams will have to put in language where they explicitly define “woman” as “born with exactly two X chromosomes and a vagina”. Then deal with the hate from the LGBTs
It is sufficient to say, “all women have a karyotype 46 XX”. If you want to include women with Turner’s syndrome, you could add the language “or 45 XO” to the above. You could also say, “no person with the karyotype 46 XY may compete in this league”.
Physical features are the least of it.