Risky by Genericc616 is pretty much entirely about impregnation.
48 Hours As A Girl by generaljiggler and a whole bunch of other people(it's a public story so anyone can contribute) is about
not getting impregnated, but most of the story arcs have the MC fail at that.
The Virgin Heroine by hematoma has some impregnation themes and is about a paladin fighting corrupting demons and often failing.
Knocked Up Notions by pervold(and several others) is a story about a guy trying to impregnate his family.
Thrust by Voidhawk2 *and several others) is a story about a family surviving in a post-nuclear apocalypse and has impregnation themes.
That's probably enough of the top/popular stories that involve impregnation. A few others that I've perused at points
Apex Seed by neo_kenka is a story with lots of impregnation themes and mind control about addicting cum. It is a popular story, but it hasn't been updated for a long while.
In Space No One Can Hear You Breed by vic_elor and others is an incest story with a focus on impregnation. Another popular one that hasn't been updated for a long while.
The Chick and the Dick by Spiral is an impregnation story with a bit of non-con about a girl who grows a penis and uses it to fuck various people.
Journey of the Lost Maiden by atapoti is a non-con impregnation story about a girl trying to find a save place to go after her home was ravaged by orcs.
Rogue Space by genericc616 is a sci fi story with some impregnation branches.
Moonlight is a writer I really enjoy and all of her stories:
The Runaway Aristocrat,
Spoils of War, and
Lisa, have impregnation themes(and often non-con)
Edit: I just read your post asking about bondage and how you dislike non-con. So i guess most of this list is probably not going to help...
However, let me end with this: if anyone's got some other tips that aren't non-con/incest/non-English (which is where I've seen this crop up mostly...) I'd love to hear it!
Unfortunately while impregnation is popular, the stories involved usually do have non-con or incest. If not in that particular part or scene, then in the story as a whole. You have very specific tastes, Nemo and while that's not a problem, it does make it difficult to give you recommendations. Your best bet would be the romance section, but often those stories focus more on the relationship than the consequences afterwards...