Methods From January,2004 to April,2006,201 pregnant women(their husbands had positive serum HBV-DNA,while themselves had no HBV infection) were selected.

• 方法2004年1月至2006年4月,选取201例丈夫血清HBV-DNA(+)、孕妇无乙型肝炎病毒感染的病例。