The City Centre Transfusiology of Healthcare Facility «The 6th City Clinical Hospital», Minsk, Belarus Preclinic diagnostics of hemolytic disease of newborn babies on АВ0 system by isoserology methods 17962 women with 0(I) blood group and pregnant for the fi rst time and whose biological fathers had a diff erent blood group were examined by isoserological methods. <...> 5898 of newborn babies were belonged to the group of risk according to the system of АВ0 hemolytic disease (HDN) and their samples of blood were examined by Rosenfіeld blood test during their fi rst days of life modifi ed by the authors. <...> Diff erent degrees of manifestation of АВ0-HDN were detected among 1196 (20,2%) newborn babies. <...> The authors came to the conclusion that the proposed spin-method allows to diagnose АВ0-HDN 3–4 days before its clinical manifestations and, consequently, in advance to help neonatologists solve tactical matters to assist the newborn and minimize the risk of the development of serious complications in the early postnatal period. <...> Материалы и методы исследования Работа выполнена в период 2009–2012 гг. в отделениях анестезиологии, реанимации и интенсивной терапии недоношенных детей научно-исследовательского института педиатрии им. <...> Недоношенные дети поступали в стационар НИИ педиатрии из родильных домов г. Баку и районов Азербайджана. <...> Всего обследовано 310 недоношенных детей различного гестационного возраста. <...> У 119 (38,4 ± 3,0%) была выявлена внутриутробная вирусная инфекция, из них 502 Неонатология у 41 (34,4%) детей была выявлена ЦМВИ, у 32 (26,9%) детей выявлена ГВИ, у 17 (14,3%) новорожденных вирусная инфекция Эпштейна – Барра, у 29 недоношенных, что составило 24,4%, выявлена смешанная вирусная инфекция <...>