Modern genetics reveals that over 50 genes across many chromosomes—not just X and Y—govern sex development. The term “sex ...

Now, a growing body of scientific evidence shows hundreds of genes act differently in the brains of biologically male or female humans. What this means isn't yet clear, though some of the genes may be ...

A new scientific study has revealed that hundreds of genes in the human brain operate differently between males and females, ...

It's supposed to fight off invaders to keep us healthy. But sometimes it turns traitor and attacks our own cells and tissues.

Caster Semenya, the South African double Olympic 800 metres champion, lost her appeal against World Athletics rules that women with high natural testosterone levels must take drugs to reduce them to ...

The Supreme Court agreed to freeze a lower court order that stopped the State Department from enforcing a new passport policy ...

The Supreme Court is allowing President Trump to require new U.S. passports to list the holder's birth name and gender even ...

The Supreme Court is allowing President Donald Trump’s administration to enforce a policy blocking transgender and nonbinary ...

The Supreme Court on Thursday allowed the Trump administration to require the sex designation on US passports to align with a traveler’s biological sex, a blow to transgender and nonbinary Americans ...

The Supreme Court cleared the way Thursday for President Donald Trump to restrict U.S. passports based on gender identity.

The court's decision is not a final ruling, however; it just permits Trump's passport policy to go into effect while ...