If the sperm of two or more men were metaphorically put in a blender and prepared for artificial insemination, isn’t it possible to have twins with two dads? Has there ever been a documented case? Further, what would those twins be called? The word “fraternal” implies that both babies would have the same parents.
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Yes, it’s possible for fraternal twins to have separate fathers. It’s extremely rare, but does happen. The term for it is *heteropaternal superfecundation*.
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