As far as I'm aware, the current list of confirmed future pregnancies and permanent party members is one and the same; Kiai, Terry, Layla, Miranda, Cveta and Zina. Plus other assorted followers that may or may not be in the future.
The only NPC with any pregnancy content is vagina-equipped Terry, but it's all placeholder.
You can get pregnant from the following NPCs, that I know of:
* Roa (requires vagina)
* Feral Naga (requires vagina)
* Lizan Raider Male (requires vagina)
* Rowdy Stallion-morph Swinger (requires vagina)
* Cock-equipped Terry (requires mpreg)
* Bunnies (requires vagina or mpreg)
* Wild Cats (requires vagina or mpreg)