They are dicephalic parapagus twins , and are highly symmetric for conjoined twins, giving the appearance of having a single body without marked variation from normal proportions. Each has a separate heart , stomach , spine , pair of lungs, and spinal cord. Each twin controls one arm and one leg. As infants, learning to crawl, walk and clap required them to cooperate.
Remember conjoined twins Lori and Reba Schappell?
Conjoined Twins - Causes, Types, Prognosis, Treatment & Surgery
Whether it is for lending a hand in the rapid prototyping of products, creating prosthetic hands for children with upper arm differences, or allowing surgeons to perform high risk surgeries with much more ease than ever before, the technology is certainly providing ample benefit to society. Back in February, we reported on a complex surgery that was undertaken in Texas to separate conjoined twins. Now doctors in China are doing the same. Tomorrow June 9 , will be a huge day for one family in China, as their beautiful newborn conjoined twin girls will be separated from each other for the first time in their lives. In fact, they share part of the same digestive tract and portions of their anus. Like most surgeries which involve the separation of conjoined twins, it is an extremely risky and difficult operation. In studies, this has been shown to be the best time to perform such an invasive procedure, as babies tend to be strong enough at this point, and their bodies are ready to heal on their own.
Conjoined twins (WARNING: GRAPHIC IMAGES)
Conjoined twins are identical twins  joined in utero. An extremely rare phenomenon, the occurrence is estimated to range from 1 in 49, births to 1 in , births, with a somewhat higher incidence in Southwest Asia and Africa. Most live births are female, with a ratio of Two contradicting theories exist to explain the origins of conjoined twins.