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

A new study in Nature shows that when pregnant mice don’t have enough iron, their (usually male) fetuses with a Y sex ...

The accurate distribution of chromosomes in an oocyte is essential for the correct transmission of genetic information to the ...

A human’s sex is genetically determined. One of our 23 pairs of chromosomes carries genes that determine the embryo’s sex; ...

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

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

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