(This article uses ‘women’ and ‘female’ to describe people with two X chromosomes and no Y chromosome, reflecting the language of the study. Nature recognizes that not all people who ...

But the Trump administration’s recent guidance to “restore biological truth” on gender determination misses on both ...

Scientists discover that women's second X chromosome awakens later in life, expressing genes that protect the brain from ...

For example, when examining differences between male and female beetles, American researcher Nettie Stevens recognized patterns of chromosomes that differed between the two sexes. In particular ...

A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

"I'm not aware of any measure you can make of the human brain where the male and female distributions don't overlap," ...

The ultimate action-packed science and technology magazine bursting with exciting information about the universe ...

Female (XX) mammals inherit one X chromosome from each parent, but males (XY) receive an X from their mother and a Y sex chromosome from their father. X and Y chromosomes determine not only the ...

UCSF researchers may have discovered how the female brain remains resilient in aging, answering an age-old question of how ...

"You either have XX or XY chromosomes," Rep. Nancy Mace, R-S.C., wrote Feb. 20 on X. "Those are the options." Most commonly, a person is born with two X chromosomes (female) or an X and a Y (male).

Researchers have shed new light on how a type of heart valve disease—aortic valve stenosis—progresses differently in males and females. The research paves the way for treatments that can be tailored ...

A special edition of the journal Science focuses on women's health, including links between estrogen and dementia, at a time when gender studies are under attack.