University of Adelaide researchers discovered monotremes use a completely different sex determination system than other ...

Two X chromosomes mean girl, and an X paired with a Y means boy. For the last 300 million years, this system has worked very ...

Low iron levels can flip the genetic switch on a mouse's sex during development, causing XY embryos to grow female features.

Scientists are expressing concerns about male reproductive health due to the Y chromosome's genetic material loss, ...

Researchers from the University of Adelaide, in collaboration with the University of Melbourne, University of Queensland and ...

The ‘Y’ chromosome essential for developing male features is gradually disappearing What does it mean for the future of male ...

For decades, scientists have known that platypuses and echidnas – Australia’s unique egg-laying mammals – have another ...

Scientists, for the first time, have shown that external factors can play a role in altering the sex that a mammal is born as ...

World Boxing says Algerian boxer Imane Khelif, who won gold at Paris Olympics, won't be allowed to compete until she undergoes sex testing.