Conjoined twins: three cases in one tertiary medical center and literature review.

Conjoined twins are so rare that most obstetricians will not be personally exposed to such cases during their professional lifetimes. The authors report three cases including one of dicephalic parapagus conjoined twins and two thoracopagus conjoined twins in the present tertiary medical center, and discuss the diagnosis and management details. They also review the incidence, embryological, diagnostic, obstetrical, and prognostic aspects of conjoined twins. Regular antenatal visits and serial ultrasound scanning are crucial for early diagnosis of conjoined twins, optimal obstetric management and perinatal preparation still remain challenging, and multidisciplinary cooperation is urgently needed.