Objective To assess the relationship between the serum IgG antibody titer of pregnant women and the hemolytic dis‐ease of newborn(HDN) .Methods Using microcolumn gel coombs card assay method to determine titer of 255 cases of couples an‐tenatal serum IgG antibody and ABO blood group .Results with 195 cases of ABO‐incompatible couples ,the positive rate of abnor‐mal serum IgG antibody(≥64)was 93 .8% .The titer of anti‐A/B IgG :in 12(6 .2% ) cases was <64;in 12(6 .2% )cases was 64;in 60(30 .8% )cases was 128 ;in 39(20% )cases was 256 ;in 45(23 .0% )cases was 512 ;in 27(13 .8% ) cases was 1 024 .There were no statistical differences between IgG anti‐A(B) titers distribution between A/O blood group matching and B/O blood group matching (χ2 =4 .361 ,P=0 .499) ,IgG anti‐A( B) titers was higher in AB/O blood group matching .Conclusion we can take early and effec‐tive prevention ,treatment ,reducing the incidence of HDN by the determination of prenatal serum IgG antibody titers in ABO‐in‐compatible couples ,which is important for the population of eugenics .

【Objective】 To determine the reference range of thromboelastogram(TEG) and establish a TEG feature for local population by measuring TEG parameters in healthy adults in Shenzhen comparing the difference between gender and age, and analyzing the reference data provided by reagent manufacturer. 【Methods】 A total of 916 healthy adults, aged between 19 to 59, who did their regular health checks in our hospital from September 2020 to August 2021 were selected. The TEG(from Lepu Medical Technology Co., Ltd.) was performed, and the clot reaction time(R), clot formation time(K), coagulation angle(α-Angle), maximum amplitude(MA), coagulation index(CI), fibrinolysis index LY30 and the estimated percent lysis (EPL) were analyzed. 【Results】 The reference ranges of TEG parameters, including R, K, α-Angle, MA, CI, LY30 and EPL, of 916 healthy adults from Shenzhen were 3.25~8.19 min, 0.66~3.18min, 47.70~76.56deg, 50.05~72.91mm, -4.3~3.4, 0~2.2% and 0~3%, respectively. The value of α-Angle, CI, K, LY30, MA and R didn’t all meet the given range provided by the manufacturer; some were exceeding and some inferior to. A total of 227 out of 916 individuals presented abnormal results, relative to the references, in at least one parameter, and 78 were diagnosed of abnormal coagulation based on the given reference range, with a specificity of 75.2%. 【Conclusion】 The reference range of TEG parameters of Shenzhen locals is significantly different from that provided by manufacturers. And it is imperative for local TEG laboratories to establish their own reference ranges according to age and gender groups based on local population characteristics.