In the Star Trek: The Next Generation episode Encounter at Farpoint, we see Deanna Troi wearing some kind of mini-skirt uniform.
I did not remember this before, as Troi wore more casual clothing later in the show, but I thought it was a great tribute to Uhura's uniform in the original series.
But later in this episode, we see this:
While I did not see all TNG episodes, I do not remember anyone else wearing this kind of outfit. It's just that I wouldn't see Picard (or worse, Worf) wearing that!
I could imagine it's the next step in gender equality, but how did it came in the show and how it left?