A woman with a monochorionic diamniotic twin pregnancy was referred to our Centre due to a discrepancy in size between the foetuses. She was 17 weeks’ pregnant when the diagnosis of selective IUGR type 2 was made and the laser ablation of the placental anastomoses was performed. During the fetoscopy, we identified an arterio-venous anastomosis with bidirectional flow, which is atypical in this type of anastomoses (unidirectionals) and could represent a sign of ominous prognosis for the restricted twin.

A pregnant woman with monochorionic twins was referred to our Centre due to discrepancy in size between the twins. She was 17 weeks pregnant when we made the diagnosis of selective IUGR type 2 and we decided to perform a fetoscopic Laser ablation of the placental anastomoses. During the fetoscopy, we identified an arterio-venous anastomosis with bidirectional flux that is completely atypical in these anastomoses, never reported before, thus representing a sign of bad prognosis for the small twin.

A pregnant woman with monochorionic twins was referred to our Centre due to discrepancy in size between the twins. She was 17 weeks pregnant when we made the diagnosis of selective IUGR type 2 and we decided to perform a fetoscopic Laser ablation of the placental anastomoses. During the fetoscopy, we identified an arterio-venous anastomosis with bidirectional flux that is completely atypical in these anastomoses, never reported before, thus representing a sign of bad prognosis for the small twin.