Since many conjoined twins share blood, nutrition given to one twin would flow to the other. If they have two digestive systems, this would probably cause problems to to both twins as one eats a lot and the other eats less. read more
Abby and Brittany's parents immediately rejected the option to separate the twins because the doctors said it was unlikely that both would survive the operation. In fact, Abby and Brittany are one of the rarest set of dicephalic parapagus twins in the world meaning conjoined with separate heads and one body. read more