pygopagus การใช้

He suggested that they had in fact been pygopagus ( twins joined at the pelvis ).
Most notably, Millie and Christine McCoy ( or McKoy ), pygopagus twins, were born into slavery in North Carolina in 1851.
It is mostly confused with pygopagus where the twins are joined ventrally at the buttocks facing away from each other, whereas ischiopagus twins are joined dorsally at the sacrum and coccyx.
Pygopagus twins are known to put their arms around each other's shoulders when walking, and Ballantyne suggested that this accounted for their apparently being joined at the shoulders in drawings.
He first gained international recognition in 1957 by the separation of two female pygopagus infants ( conjoined at the spine ) sharing a liver, colon, and parts of the intestines with their entire trunks merged.