Living as One The life expectancy for conjoined twins who are unable to be separated strongly depends on what organs they share. Conjoined twins that share a heart for example have a low survival rate. Ronnie and Donnie Gaylon are currently the world’s oldest living conjoined twins at 61 years old. They have separate stomachs, lungs, and hearts, but share one large intestine and a single set of male reproductive organs. Their longevity is a medical miracle by itself
Ronnie and Donnie Galyon are the world's oldest living set of conjoined twins and also the world's only adult male conjoined twins. Born in Dayton, Ohio on October 28, 1951, the brothers, joined from the sternum to the groin, were delivered vaginally. According to Ward Hall, the twins' mother rejected them when they were born, leaving them to be raised by their father, Wesley, and later stepmother Mary. Because they share a single set of male organs, doctors decided not to separate them.