It could be exciting to There are different types of twins that occur in not only to humans but to a variety of different types of mammals, they are either dizygotic or monozygotic. In the case of conjoined twins, they are monozygotic, or identical, and the highest incident is in humans (Kaufman, 2004). It occurs two weeks after fertilization or at the primitive streak stage where the twins get attached to one another. Conjoined twins have a common placenta, an amniotic as well as chorionic sac (National Library of Medicine, 2006). The attachment could happen in different parts of the body and the twins could share several organs. Having conjoined twins is uncommon and happens in one in 200,000 births; furthermore, their survival rate ranges …show more content…
It would have been harder if the brain were connected. The next thing they did was make up a 3D model to analyze the twins’ vascular system in the head to see if both twins shared the same vascular system or have different ones. Most of the time and cases of craniopagus twins, they have different arteries but twisted veins which run from one twins’ brain with the other one. Veins is a major complication for surgeons to separate because one twin may be left with too many veins which may cause swellings in the head, on the other hand, the other twin may get too few veins which will cause heart failure. Neurosurgeons inserted a dye in to these twins’ arteries to follow the path of blood in their brains using X-rays. Their blood was not being pumped evenly yet surgeons thought that they have adequate time to separate the twins in steps rather than at once. When the twins were 8 months old, surgeons started dividing the veins of their brains and gave one twin the superficial system while the other was given most of the deep system and expecting the brain to expand the smaller veins in order to cope with the loss of the other