A pair of conjoined twins born sharing a tailbone and genitals will have to undergo a lengthy operation to be separated . The twin sisters were born on 17 March at Ningdu Hospital in Jiangxi , China . They were delivered via caesarean section after their mother 's blood pressure dramatically increased , the People 's Daily Online reported . Rare : A pair of conjoined twins born in Jiangxi , China , sharing a coccyx and genitals , will have to undergo a lengthy operation to be separated . The girls ' father , whose surname is Zeng , 35 , said his daughters were transferred to a Shanghai hospital yesterday after doctors advised him they desperately needed separation surgery . The twins are the man 's first children with his wife , to whom he has been married for eight years . A hospital report stated : 'The twins are joined by their sacrococcygeal regions and their genitals . One back passage is blocked and the other is normal . ' It added that the twins might die if they are not given separation surgery within four days . The operation could take up to 12 hours . Joined : The twin sisters were born on March 17 and were rushed to the Children 's Hospital of Fudan University in Shanghai yesterday . Expertise : Medical staff attend to the twins as they are transferred between hospitals via ambulance . A hospital report stated : 'The twins are joined by their sacrococcygeal regions and their genitals . One back passage is blocked and the other is normal ' A pair of conjoined twins who shared a liver were successfully separated in Kunming , south west China , earlier this month . And at the end of February two ten-month-old conjoined baby girls from Texas survived a world-first operation to separate them . Knatalye Hope and Adeline Faith Mata shared the same chest wall , lungs , pericardial sac , diaphragm , liver , intestines , colon and pelvis . Care : The report added the twins might die if they are not given separation surgery within four days . Above , they are carefully carried into hospital while wrapped in a huge red blanket . Concern : The twins are Zeng 's first children with his wife , who he has been married to for eight years . Above , the 35-year-old climbs into an ambulance . A team of more than 26 clinicians , including 12 surgeons , six anesthesiologists and eight surgical nurses at the Texas Children 's Hospital operated to separate the girls . The 26-hour surgery was the first time twins conjoined at the chest and abdomen in this way had been successfully separated .
Twin sisters were born on March 17 at Ningdu Hospital in Jiangxi , China . They were joined at the tailbone , and share genitals . The pair will be separated using surgery at a different hospital in Shanghai . The operation is expected to take up to 12 hours .