'The Star-Pit' by Samuel R. Delany was published in Worlds of Tomorrow and then broadcast on WBAI-FM in November, 1967. It's available here in four parts. Delany's notes are here.
In 1967, two years prior to Stonewall, on the written page the most notable thing about “The Star-Pit” had been its gender skewing.I've not read the printed version but the audio .. I can see how it might be remarkable for 1967. Forty years on ... it is indeed invisible.
"You can grow kid-boy or you can die. That's the choice you've got and it goes on all your life."