This is also an opportunity for me to take a broader look at how SF handles gender, and specifically, the idea that gender roles and even our definition of gender might change. When you think about it for just a moment, that's a very obvious component of worldbuilding--we don't look at gender the same way that people from only a few decades ago did, so why should people centuries in the future, who live in galaxy-spanning, space-faring societies, have gender roles that so closely resemble ours? And yet it's rare for SF to approach this topic head-on, as I discuss in this essay.
Perhaps more than any other topic, gender challenges writers of science fiction to expand their viewpoint and imagine different ways of ordering society. The adage that it is easier to imagine the end of the world than the end of capitalism applies even more strongly to prevailing gender norms. Many early science fiction writers found themselves, either intentionally or thoughtlessly, replicating the gender roles of their moment even as they invented technologies that would overhaul their societies. Asimov's robot stories, for example, are steeped in 1950s middle class gender roles that even he must have known were not a universal constant. This despite the fact that most of the robots introduced to these settings are intended for household labor (and, for some reason, coded male).
It's an incredibly broad topic, and even in an extra-long essay, I can only touch on the handful of issues it raises very briefly. If you have more ideas, please raise them in the comments.