Oldest conjoined twins ever (female)

The oldest female conjoined twins ever (as well as the oldest living conjoined twins) are Lori Lynn and George (b. Dori) Schappell (b. 18 September 1961) of Reading, Pennsylvania, USA, who were aged 62 years 30 days as of 18 October 2023. Lori and George are craniopagus twins, meaning that they are joined at the skull; it is the rarest form of conjoined twinning, representing only 5% of cases.

The Schappells became the first same-sex conjoined twins to identify as different genders when, in 2007, Dori declared that he was transgender, identifying himself as a male named George. Lori is able-bodied but George has spina bifida, and requires a wheelchair. They share an apartment and each has their own room and have very different interests; Lori is an accomplished bowler while George is a professional country singer who has performed around the world.

The Schappells surpassed the previous oldest female conjoined twins, Masha and Dasha Krivoshlyapova (Russia, b. 3 January 1950), who passed away in Moscow, Russia, within 17 hours of each other on 17 April 2003 aged 53 years 104 days. The Krivoshlyapova twins' form of conjoining is medically known as dicephales tetrabrachius dipus (distinguished by having two heads, four arms and two legs).

The oldest conjoined twins overall on record were Ronnie and Donnie Galyon of Dayton, Ohio, USA (b. 25 October 1951), who were aged 68 years 253 days when they died on 4 July 2020.