Better not let those yaoi Mpreg fangirls hear you.
Considering you can impregnate, and if female or a futa, be impregnated by bats, sharks, wolves, Zora/Xenomorph aliens, cows/bulls, cats, dragons, golems, birds, bees, demons, angels, slimes, hybrids of nearly all of them and, if the future plans are to be believed, ghosts/zombies and rats, it could be possible for males to become pregnant as well. With insect/aquatic creatures, it is very possible, since a few of the females of those races inject eggs into live hosts, regardless of the target's gender or willingness.