Correlation analysis between blood type IgG antibody valence and hemolytic disease of newborn(HDN) of pregnant women with maternalfetal ABO blood type incompatibility

Objective To investigate the correlation between the blood type IgG antibody valence and the hemolytic disease of newborn(HDN) of the pregnancy women with maternal-fetal ABO blood type incompatibility. Methods 2137 pregnant women with blood type incompatibility who delivered in the obstetrical department of our hospital from September 2011 to February 2014 and their neonates were selected as the study subjects. The last serum IgG antibody valence equal to or greater than 64 served as the clinical standard. After birth, the neonates' HDN related indicators were examined. The correlation between pregnant women's blood type IgG antibody valence and HDN and the risk factors were analyzed. Results Of the 2137 pregnant women with ABO blood type incompatibility, 458 perinatal infants had hemolysis. As the pregnant women's IgG antibody valence increased, the incidence of HDN rose significantly;Pearson correlation analysis showed that the correlation coefficient was r=0.82. Univariate analysis found that increase of number of pregnancies, increase of age, poor childbearing history and other factors were independent risk factors of HDN. Conclusion Before birth, blood type examination of couples and fetuses should be enhanced, IgG antibody detection of pregnant women with maternal-fetal ABO blood type incompatibility should be conducted, the pregnant women with advanced age, multiple pregnancies and adverse pregnancy history should be monitored closely, and proper intervention should be implemented in order to avoid the occurrence of HDN.