The term "gender" was taken by feminists from grammar and used to refer to differences between the sexes that are not "biological", or innate. But on the Male–Female Differences list we are especially interested in identifying those differences that cannot be dismissed as purely societal in origin. In that sense we are interested in sex rather than gender. The original generic title of this section of my site (gender) was chosen to avoid certain practical problems that a more accurate title might create on the Web. I am now using the accurate title on the overall home page to see how it goes. I've left the graphic title on this page alone, pending the outcome.
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10 Big Differences Between Men’s and Women’s Brains