litphoria

Expresses an interest in sexual encounters with the specific intent to create offspring.

Yes. Pregnancy is about the whole process of the growing belly, the hormones, etc, while breeding is specifically about the act of sex with the intent to cause pregnancy. I think of forced breeding, and giving or taking of breeding, and the visual of that act. While

Forced Pregnancy

It does not have the same feeling as

Forced Breeding.

Likely related.

Though, that one isn't getting a lot of love.

I had not seen that one before, though I must admit that I like the term breeding better than impregnation. They do both speak of the same concept, though.

Impregnation is likely a little broader, since it covers things like the pregnancy just happening or a more 'loving' mindset surrounding when it happens than I've normally seen breeding imply. Still, I think with context and/or the 'forced' idea you'd wind up being able to make things pretty clear. Either way though, probably doesn't matter TOO much.

Either way, they are attempting to solve the same thing, so as soon as one goes through, I will close the other.