Craniopagus twins known sets of twins of all time. In history, Castor and Pollux fought Greek battles alongside other famous war heroes like Herkules and Achilles. The Greeks held these twins in high standing and they were seen not just as warriors but as gods. Although there are cases of conjoined twins dating back to as early as the 10th century, it was not until 1491 that the first case was documented. Apart from that, Sebastian Munster’s "Cosmographia universalis" provides the true first account of craniopagus twins who happened to live for ten years, exceeding many expectations during that time. He describes
Monoamniotic twins Monoamniotic twins Monoamniotic twins are identical twins that share the same amniotic sac within their mother’s uterus. Monoamniotic twins are always identical, always monochorionic and are usually termed Monoamniotic-Monochorionic ("MoMo" or "Mono Mono") twins. They also share the placenta, but have two separate umbilical cords. Monoamniotic twins develop when an embryo does not split until after formation of the amniotic sac, at about 9-13 days after fertilization. Monoamniotic triplets or other monoamniotic multiples are possible, but extremely rare. Other obscure possibilities include multiples sets where monoamniotic twins are part of a larger gestation such as triplets, quadruplets, or more. Monoamniotic