Conclusions Deficiency of trace elements of pregnant women during the third trimester might affect their newborns' birth status.

结论孕晚期孕妇微量元素含量对新生儿出生状况有一定影响。

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In this study, 340 pregnant women in the third trimester were randomly assigned to receive inactivated influenza vaccine or the 23-valent pneumococcal polysaccharide vaccine (control).

在这个研究中，340名孕妇在孕期第三个三个月中被随机的分配接受灭活流感疫苗或者23 -价肺炎球菌多糖疫苗注射(对照)。

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Methods The pregnant women performed ultrasound examinations during second or third trimester in our hopital, if abnormal fetus were found and compared after childbirth.

方法对妊娠中、晚期孕妇进行超声检查，发现畸形胎儿与分娩后作对比。

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