"Joanna Russ Publishes The Female Man, "When It Changed" (1970, 1972)
An outspoken lesbian feminist, Joanna Russ was extremely influential in terms of sexuality and gender in science fiction when the genre was just beginning to hit its pop-cultural stride in the 1970s." via
" Science fiction writer James Tiptree, Jr. earned the reputation of being a male author who understood women.
.... In reality, he was a she. Alice B. Sheldon (1915 - 1987) used the male pen name to write in a time when male authors could expect more success in the realm of science fiction." via NPR