star trek probably wasn't the first, in this case, but there was an episode of enterprise with mpreg
@in-a-trans-like-state replied to your post “benadrylthegoodstuff: mattfog: “where did this weird trope even…”
yep there was mpreg in star trek the episode was “Unexpected” in the Star Trek: Enterprise series
Star Trek, why is it always you. Thanks, you two, for helping me out with this!
(Unexpected was the ep, Trip was the father…. kind of. it’s complicated and dated)