Biological sex is all over the news lately. Whether it's via President Trump's executive order affecting passport policy, moving trans inmates... How is sex determined? Scientists say it's complicated ...

A biology professor at a Texas community college has claimed he was fired for “religious preaching” after he taught a lesson about how sex is determined by X and Y chromosomes. Johnson Varkey, who has ...

Richard Dawkins, the celebrated evolutionary biologist, has recently used the claim that biological reality entails that sex is binary, to launch a broadside on the gender choices of trans people. In ...

Defining gender as a condition determined strictly by a person’s genitals is based on a notion that doctors and scientists abandoned long ago as oversimplified and often medically meaningless.

A growing number of Americans believe that an individual's gender should be determined based on the sex listed on their birth certificate, a new poll has found. The NPR, PBS NewsHour and Marist poll ...

How much does a child's sex determine their behaviour from a very young age? It's an issue that continues to divide both parents and researchers. While behavioural scientists say that hormones do ...