Feminist science fiction is a sub-genre of science fiction

Science fiction

Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 which tends to deal with women's roles in society. Feminist

Feminism

Feminism is a collection of movements aimed at defining, establishing, and defending equal political, economic, and social rights and equal opportunities for women. Its concepts overlap with those of women's rights...

 science fiction poses questions about social issues such as how society constructs gender roles, the role reproduction plays in defining gender and the unequal political and personal power of men and women. Some of the most notable feminist science fiction works have illustrated these themes using utopia

Utopia

Utopia is an ideal community or society possessing a perfect socio-politico-legal system. The word was imported from Greek by Sir Thomas More for his 1516 book Utopia, describing a fictional island in the Atlantic Ocean. The term has been used to describe both intentional communities that attempt...

s to explore a society in which gender differences or gender power imbalances do not exist, or dystopias to explore worlds in which gender inequalities are intensified, thus asserting a need for feminist work to continue.
According to Elyce Rae Helford:

"Science fiction and fantasy serve as important vehicles for feminist thought, particularly as bridges between theory and practice.