RESUMO
Objective: the aim of this study was to determine frequency distribution of ABO-hemolytic disease of newborn [ABO -HDN], clinical and laboratory feature also evaluated
Materials and Methods: during 8 months all A or B blood group babies delivered from O -blood group mothers were elected in cina maternity hospital for 8 months - If Jaundice appeared in first 48 hours of life, routine hematologic tests were done. The diagnosis of ABO -HDN was based on jaundice in first two days of life with positive free Anti -A or Anti -B in serum of infant. Statistical analysis was performed by frequency distribution and chi - squire test, P-value of less than 0.05 were considered statistically significant
Result: a set-up ABO incompatibility between mother and baby was in 10,3 percent of singleton pregnancies, but frequency of ABO-HDN was 1.6 percent of births. Clinical and laboratory feature were normal. Spherocytosis was present in only one baby
Conclusion: the frequency of ABO- HDN was 1.6% of births, lower than usually expected; jaundice was the only clinical feature