Look at one and then the other. Can you tell which brain is female and which is male? You can't. Humanity has been hunting ...

The genes of male and female placentas have marked differences in how they are expressed, according to a study by researchers at the National Institutes of Health (NIH) and other institutions.

A 2019 study aimed to explore the sex differences in subjective and objective ... A 2018 study found that the higher male-to-female diagnosis ratio is seen in clinical samples but not in ...