[Diagnosis of conjoined twins in a pregnant woman at term]

Conjoined twins are a rare malformation of monozygotic and mono-amniotic twin pregnancies. We report the case of a patient in whom dicephalic conjoined twins was diagnosed in the antenatal period at 37 week amenorrhea. Fetal prognosis is very poor and, if the diagnosis has been made early, it most often requires therapeutic abortion. The purpose of this case study was to remind clinicians of this very rare disease, of the importance of ultrasound as an essential diagnostic tool to implement a strategy to manage patients in the postpartum period and of prognosis which is most often very guarded.