Siamese Turtle
once in a blue moon........
Conjoined twins are identical whose bodies are joined together in utero. It is a rare phenomenon; it is estimated to range from 1 in 50,000 births to 1 in 200,000 births, with a somewhat higher level of occurrence in Southwest Asia and Africa.Approximately half are stillborn, and a fraction of pairs born alive have abnormalities incompatible with life. The overall survival rate for conjoined twins is approximately 25%.About 70 to 75% of conjoined twin pairs are female.Conjoined twins form in one of two ways. The first is fission, in which the fertilized egg splits partially, resulting in two-to-one type conjoined twins, i.e. Dicephalus twins. The second is fusion, a more common type of conjoined twinning, in which a fertilized egg completely separates, but stem cells (which search for similar cells) find like-stem cells on the other twin and fuse the twins together. This results in single and relative organ sharing, i.e. Thorapagus twins.
Conjoined twins are identical whose bodies are joined together in utero. It is a rare phenomenon; it is estimated to range from 1 in 50,000 births to 1 in 200,000 births, with a somewhat higher level of occurrence in Southwest Asia and Africa.Approximately half are stillborn, and a fraction of pairs born alive have abnormalities incompatible with life. The overall survival rate for conjoined twins is approximately 25%.About 70 to 75% of conjoined twin pairs are female.Conjoined twins form in one of two ways. The first is fission, in which the fertilized egg splits partially, resulting in two-to-one type conjoined twins, i.e. Dicephalus twins. The second is fusion, a more common type of conjoined twinning, in which a fertilized egg completely separates, but stem cells (which search for similar cells) find like-stem cells on the other twin and fuse the twins together. This results in single and relative organ sharing, i.e. Thorapagus twins.
23-08-2007
