Futurama Episodes

Amy’s romance with Kif takes a twist when he gets pregnant. As Amy questions her commitment Kif, he must return to his ancient, mysterious homeworld to give birth in the same muddy swamp where he was born.
wikipedia.org summary:
Amy’s relationship with Kif leads to pregnancy… Kif being the pregnant one. But Amy fears that she won’t be able to handle the burdens of motherhood, much to Kif’s dismay.
imdb.com summary:
Amy is distressed when her alien boyfriend Kif becomes pregnant.