AIM To analyze the difference of intrauterine infection rate in different periods of pregnancy and to determine the timing of HBV intrauterine infection.
目的分析不同孕期乙型肝炎病毒宫内感染率的差异，探索HBV宫内感染发生的时间。
AIM To analyze the difference of intrauterine infection rate in different periods of pregnancy and to determine the timing of HBV intrauterine infection.
目的分析不同孕期乙型肝炎病毒宫内感染率的差异，探索HBV宫内感染发生的时间。
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