We carried out the investigation to evaluate hepatitis B virus (HBV) infection status and the influence of HBV infection in pregnant women in Tianjin of China. We founded that the prevalence of HBsAg was 3.77% (69/1829). 88.57% (1620/1829) pregnant women conducted HBsAg screening in last pregnancy. Spontaneous abortion and premature delivery did not show significant differences between HBV infected and uninfected pregnant women. But ALT and AST levels were significantly higher in infected women. And 56.65% of participants (997/1760) were anti-HBs positive. In conclusion, HBsAg prevalence was moderate in pregnant women in this region, which was consistent with the total population in western Pacific regions. And HBV infection did not influence spontaneous abortion and premature delivery. But the HBsAg screening was conducted mostly in the last pregnancy. Early screening and intervention were suggested in pregnant women within countries of moderately endemic regions.
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