Mpreg
Male pregnancy is the incubation of one or more embryos or fetuses by organisms of the male sex in some species. Most species that reproduce by sexual reproduction are heterogamous—females producing larger gametes (ova) and males producing smaller gametes (sperm). In nearly all animal species, offspring are carried by the female until birth, but in fish of the family Syngnathidae (pipefish, seahorses and the leafy seadragon), males perform that function.
Occurrences
Mpreg is a major plot point in the second story of Fazbear Frights 5: Bunny Call, the fifth volume of the Five Nights at Freddy's horror story anthology. In this story, a game developer named Matthew becomes pregnant with a Springtrap baby, which later pulls itself out of a hole in his stomach. It calls him Daddy and then he dies.