Transmigrations about Cultivation, farming and with cute little kids. Ger, Ge'er, Omega and etc. gender most of it. Male to male relationship and a doting ML to MC and vice versa.  At the bottom of this list I have put some "no transmigration, its more modern story" but still an Mpreg and there's also omegaverse and rebirth. 

-Just added new novels and there are modern day novels, ancient times, rebirths and world hopping or interstellar novels. Some of the novels where mpreg or omegaverse but the main protagonist doesn't have a child and or adopting kids.