但是待产妇和其他人可以结合一些其它证据来审慎地权衡这项发现，研究者补充到。

But expectant mothers and others should weigh the findings judiciously against other evidence, the researchers added.

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而临产妇女较足月妊娠待产妇女明显降低（P<0.01），产后妇女明显低于妊娠不同时期（P<0.01）。

The serum nitric oxide level in term labor was significantly lower than that in late-trimester(P<0.01), and was significantly lower in postpartum than that in all the periods of pregnancy(P<0.01).

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