Human biology is not black and white. Although newborns are typically categorized as male or female at birth based on visible ...

New research published in Biology of Sex Differences has found that sex differences in brain structure are already present at birth and remain relatively stable during early postnatal development. The ...

Watch the Video Click here to watch on YouTube Chameleons are celebrated for their incredible ability to change color at will ...

It seems the Trump administration is arguing that people like me are neither male nor female but simply ‘disordered,’” writes ...

It's commonly thought that sperm "race" to the egg, with the winner fertilizing it. But is this really the case?