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An X-ray of conjoined twins born with two backbones and two heads!!

Conjoined twins are identical twins whose bodies are joined in utero. A rarer form of conjoined twinning, seen here, is the dicephalic parapagus twins which fused side-by-side with a shared pelvis and two separate heads. If carried to term, most dicephalic twins are stillborn, or die soon after birth. Very few survive to adulthood. The extent to which limbs and organs are duplicated varies from case to case. One head may be only partially developed (anencephalic), or both may be complete. In some cases, two complete hearts are present as well, which improves their chances of survival. The total number of arms may be two, three or four. Their prospects are best if no attempt is made to separate them, except in cases where one twin is clearly dying.