Conjoined twins occur when identical twins have fused bodies before they are born. This condition has also been known as "Siamese twins," now considered an inappropriate, outdated term.

Formerly conjoined twin sisters turn 1, take first steps Family searching for car seat for conjoined twins Conjoined twin girls successfully separated. How doctors did it Formerly conjoined twins ...

Twins Sydney and Lexi were conjoined at birth and separated seven months later in a risky surgery, but are now thriving at age 17 Julie Mazziotta is the Senior Sports Editor at PEOPLE, covering ...