[Jim from C-Town]

They are fraternal twins from what I can tell. They each had an embryo they fertilized implanted in the woman. The woman was NOT the egg donor, only the incubator.

I know. you need a flow chart to keep up with the deviancy. It gives me a headache.

[defconw]

Thanks for explaining. I know what you mean about the headache!

[Andy'smom]

I think they would be half-brothers is the same woman donated the eggs.

[Svartalfiar]

They are fraternal twins from what I can tell. They each had an embryo they fertilized implanted in the woman.

Actually, they'd be more like step-fraternal twins, as they have different fathers. (Assuming both eggs came from the same woman.) If the eggs were different, then they wouldn't be related at all.

[Boogieman]

They’re not fraternal twins, because fraternal twins still share the same two parents. These are “womb-mates” I guess, but they’re not twins under any ordinary meaning of that term.