Abstract
Objective: To analyze the prevalence of maternal Rh isoimmunization from 2018 to 2020 in a maternity hospital in Amazonas. Methods: An observational and descriptive retrospective study of cases of maternal Rh(D) sensitization attended in a public maternity hospital in the city of Manaus, Amazonas, Brazil, was conducted. Secondary data from medical records were used to analyze variables such as blood typing and RhD factor, age, race, gestational age, parity, Coombs control tests. These medical records were catalogued in the Medical and Emergency Care Service (SAME) during the study period. Results: The prevalence was 1.49% of reported cases. The mean age of pregnant women was 25.17 years, and 63% of the patients were brown. The blood typing was 61.2% of the women were O negative and the newborns 41.5% were O positive. The mean number of prenatal visits was only 5.3. Conclusion: The prevalence rate found, although low, could be even lower, since in most women in the North Region other blood types are more prevalent. The low number of prenatal consultations may have been a factor responsible for the failure to prevent perinatal hemolytic disease in the state.