Talk:Embryo/@comment-108.67.246.62-20150406185057/@comment-83.117.213.146-20150422161933

It's done IRL to cross all sorts of species, or prevent species that can't reproduce on their own from going extinct.

Pugs, as a well known example, are such a mess "bred for the public" that they have all sorts of health problems and can't even coplulate normally. Thus, a male's seed is taken and put into the egg of the female, so she becomes pregnant of pups.

It's exactly the same, this manner of getting animals pregnant (even of another species it's related to some way) is not science-fiction, it's real science.