What are…
Dicephalic parapagus / parapagus dicephalus twins ?
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According to Wikipedia
Dicephalic parapagus is a rare form of partial twinning with two heads side by side on one torso. Infants conjoined this way are sometimes called "two-headed babies" in popular media. The condition is also called parapagus dicephalus.
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Here’s a short interview by Abby and Brittany Hensel about their condition:














