Preslee Faith and Kylee Hope Wells were born Oct. 25 and are joined at the liver and rib cage, said David Tuggle, a pediatric surgeon who will be involved in the separation.
The twins' parents are 21-year-old Kyle Wells and 20-year-old Stevie Stewart of Calumet. Both have a history of twins in their families.
Stewart, a member of the Cheyenne River Sioux tribe, said the girls already are developing personalities. For example, Kylee "is laid back and sleeps through anything, even her sister crying," Stewart said.