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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from what i remember Neil Patrick Harris(Barney from How I met your mother) and his partner have done this through a surrogate mother via in vitro fertilization
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