Conjoined twins are twins whose bodies are joined together at birth. This happens where the zygote of identical twins fails to completely separate. Conjoined twins occur in an estimated one in 200,000 births, with approximately half being stillborn. The overall survival rate for conjoined twins is between 5% and 25%. Conjoined twins are more likely to be female (70-75%).
The earliest known case of conjoined twins dates from the year 945, when a pair of conjoined twin brothers from Armenia were brought to Constantinople for medical evaluation. The English twin sisters Mary and Eliza Chulkhurst, who were conjoined at the back (pygopagus), lived from 1100 to 1134 and were perhaps the best-known early example of conjoined twins. Other early conjoined twins to attain notoriety were the "Scottish brothers", allegedly twins of the dicephalus type (1460–1488; although the dates vary); Helen and Judith of Szony, Hungary (1701–1723), who were pygopagus twins and enjoyed a brief career in music before being sent to live in a convent; and Ritta and Christina Parodi of Sardinia, born in 1829. Ritta and Christina were dicephalus tetrabrachius twins and although they died at only eight months of age, they gained much attention as a curiosity when their parents exhibited them in Paris.
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About.com: Conjoined Twins - Links to informative sites on conjoined twins, also known as siamese twins.
Meta Description: [ Conjoined twins, also known as Siamese twins, are a rare aspect of multiple birth that is covered here with profiles of conjoined twins as well as medical information about the condition. ]
CNN.com: Conjoined Twins and Parents of Conjoined Twins Share Experiences - Transcript of a Larry King Live show, with interviews from the parents of the Stark twins, the Schappell twins as well as a doctor assisting on a separation.
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Conjoined Twins - Contains high quality images and organized information on the different types, rare forms, how they are formed, ethics, and etymology.
Meta Description: [ The world's most informative site on Conjoined Twins. Contains high quality images and organized information on the different types, rare forms, how they are formed, ethics, and etymology. ]
Conjoined Twins - Separation Issues - Information on what conjoined twins are, as well as the ethical and moral issues that arise when separation is considered.
Meta Description: [ Conjoined twins - Jodie and Mary - should doctors or parents decide about separation of conjoined twins? Information and discussion on conjoined twin issues - by Dr Patrick Dixon ]
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Conjoined Twins International - A support group for families with conjoined twins. A fairly inactive group, but the site provides information and links.
Meta Description: [ conjoined twins is a support group for famlies with conjoined twins ]
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Facts About Multiples: Conjoined Twins - Information on conjoined twins throughout the centuries, records of oldest, fastest separation etc. Diagrams on the types of conjoinment, as well as a list of conjoined twins in the world.
Joined: The World of Siamese Twins - History of conjoined twins, separation issues, recent cases, photos and profiles of conjoined twins.
Ratt's Phreeque Show - A collection of pictures and information on various conjoined twins, as well as parasitic twins, the history of conjoined twins in sideshows, as well as other sideshow anomalies.
Meta Description: [ Welcome to Ratt's Freakshow, a virtual collection of photos and bios of famous and not-so-famous human oddities. This site is always growing, so check in regularly to see updates and new features! ]
Separated at Birth - Interview with Charles and Charleu Tenorio, born in 1973 in north-east Brazil. They were separated at nine months of age. [The Guardian]
Social History of Conjoined Twins - An essay detailing the history of conjoined twins, with pictures and case studies.
Twinstuff.com: Conjoined Twins - An essay on the types of conjoined twins, as well as pictures of some famous sets.
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Types of Conjoined Twins - A breakdown of the types of conjoined twins, and what the types consist of.
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