On the other hand two sentences later: "According to Blackless, Fausto-Sterling et al., on the other hand, 1.7 percent of human births are intersex.[116][31]"

On the other hand two sentences later: "According to Blackless, Fausto-Sterling et al., on the other hand, 1.7 percent of human births are intersex.[116][31]" And if you follow those links the abstract actually says "as high as 2% of live births".