Objective To evaluate the value of prenatal ultrasonic diagnosis in conjoined twins．Method A retrospective ana1ysis was made in 8 conjoined twins diagnosed with prenatal ultrasonic．Results 8 conjoined twins were symmetry conjoined twins，including 6 cases of thoracx-omphalopagus，2 cases of parapagus ； 5 cases were female and 2 were male，the rest 1 remained unclear of sexuality． 4 cases had single umbi1ical artery ；3 cases had club foot；2 cases had cystic hygroma ；1 cases had gastroschisis ；1 cases had hydrocephalus ；1 cases had abnormal spina；1 cases had hydramnios ．8 cases were terminated gestation .Conclusions Prenatal ultrasonic is the main method in diagnose conjoined twins,it can timely and accurate diagnose conjoined twins.
