sex differences

There is overwhelming evidence to suggest that the brains of men and women differ, sometimes substantially, and especially when it comes to mental illness. But a new book, which is making waves in the media, denies this.
Regardless of what postmodernists say, there are real, objective, measurable biological differences between men and women. That's why sports are segregated by sex.
Genetics, age, and hormone fluctuations play a role in women's migraines.