Abstract: Objective：To evaluate the clinical value of procalcitonin for diagnosis of the pregnant woman with intrauterine infection. Methods：We chose intrauterine infection of the pregnant woman and the nomal pregnant woman randomly，the main observation of the patients with bacterial and viral infection of PCT，and to compare the same period Ⅱ-6，CRP，WBC，N levels. Results：Speciticity（87.9%），sensitivity（92.4%）， accuracy（83.5%），the positive predictive value（80.4%）， the negative predictive value（91.7%） and the positive rate （88.2%） of PCT for the patients with bacterial infection were higher than other projects.The patients with bacterial infection group were higher than the patients with viral infection group（P＜0.01）. Conclusions：
PCT can be used as the auxiliary diagnosis of the pregnant woman with intrauterine infection，and can effectively guide the clinical use of antibiotics to assess the therapeutic effect.

Key words: Procalcitonin, Intrauterine infection, Interleukin-6, C-reactive protein