Hydrops fetalis is a rare and extremely dangerous condition that often results in intrauterine fetal death. For reasons of development, it is divided into two categories: immune, which is caused by incompatibility of the Rh factor or the ABO system, and non-immune, associated with any other reasons. Given that the incidence of immune hydrops fetalis has decreased due to the widespread use of Rh sensitization prophylaxis, nonimmune hydrops fetalis (NHF) has become the dominant form of hydrops fetalis. Non-immune hydrops fetalis occurs in 1 in 2500-3000 pregnancies and accounts for 90% of all cases [3,4]. Despite the improvement of methods of antenatal diagnosis and treatment, the problem does not lose its relevance in practical obstetrics and neonatology.