Twitter Thread on the Biology of Sex and Sex Testing

https://twitter.com/RogerPielkeJr/status/1122845098083880960?s=20

In the Twitter thread above I explain that that while biological sex is of course real, the quest for a 100% certain biological “sex test” has never succeeded. Sport regulation of gender categories needs to accept this reality. Have a read through if interested. I’m posting her for future sharing.