No one knows. conjoined twins have been around as long as humans have, more than one million years.
The first famous confirmed case of conjoined twins were Chang and Eng Bunker.
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Conjoined twins cannot be bred. This condition is not genetic.A set of male conjoined twins fathering children with a set of female conjoined twins will almost certainly produce children who are not even twins at all.
Dr. C. Everett Koop was the first surgeon to successfully separate conjoined twins in 1956. The twins were conjoined at the abdomen and were named Patrick and Benjamin Binder. The surgery was performed at the Children's Hospital of Philadelphia.
The most famous (Chinese) conjoined twins were the Siamese twins
conjoined twins are very very very rare .
conjoined
why can't conjoined twins be brothers and sisters
No, conjoined twins Brittany and Abby are not married.
No, Brittany and Abby Hensel, the conjoined twins, are not married.
The twins were conjoined when they were born.
There is Identical twins, Nonidentical twins and Conjoined twins.
Conjoined twins. The older terminology was Siamese twins, after the first recorded twins in the country of Siam (now called Thailand).