Аннотация
A clinical case of feto-fetal transfusion syndrome in a newborn is presented. Feto-fetal transfusion syndrome (FFTS) is a severe complication of multiple monochoric pregnancy, which requires timely, correct diagnosis, diagnosis and subsequent fetoscopic laser coagulation of anastomoses to preserve pregnancy. The above clinical case of FFTS in a newborn child allows neonatologists and neonatal intensive care unit specialists to focus their attention on the features of the clinic, diagnosis and treatment of this pathology. The formation of FFTS in this case became possible due to a single placenta, which probably led to the development of transplacental vascular communications and circulatory imbalance between the intraplacental vascular beds of twin fetuses.