[Acute per-partum feto-fetal transfusion. A case study on two sets of twins].

Description of acute per-partum feto-fetal transfusion. The risk of twin-twin transfusion syndrome in monochorionic twin pregnancies is well known. This pathology starts in the second trimester and has a chronic course. Acute per-partum feto-fetal transfusion seems to be less frequent and has not been studied. In the study, we described two cases of acute per-partum feto-fetal transfusion. The outcomes of the pregnancies were as follows: following a successful delivery, the first set of twins presented hypovolemic shock at birth due to an acute anemia. The second set of twins was polyglobulic, but otherwise healthy at birth. The risk of hypovolemic shock seems to be unpredictable, even if the pregnancy is monitored. Obstetricians and pediatricians must keep this pathology in mind when dealing with this kind of pregnancy. Moreover, it would be interesting to obtain systematically a full blood count of each set of twins of monochorionic pregnancies, in order to detect every case of feto-oetal transfusion.