Craniopagus twins Craniopagus twins Craniopagus twins are conjoined twins that are fused at the cranium. This condition occurs in about 10–20 babies in every million births in the United States. Among this small group, cephalic conjoining, or craniopagus twinning, represents the rarest of congenital abnormalities, accounting for 2–6% of all conjoined twins. Additionally, conjoined twins are genetically identical and always share the same sex. The union in craniopagus twins may occur on any portion of the cranium, but does not include either the face or the foramen magnum. The thorax and abdomen are separate and each twin has its own umbilicus and
Twins in mythology Twins in mythology Twins appear in the mythologies of many cultures around the world. In some they are seen as ominous and in others they are seen as auspicious. Twins in mythology are often cast as two halves of the same whole, sharing a bond deeper than that of ordinary siblings, or seen as fierce rivals. They can represent another aspect of the self, a doppelgänger, or a shadow. However, twins can also reflect a complete opposition of the other, such as the "civilized" Gilgamesh, and the "wild" Enkidu; or in the commonly known instance of good and evil twin