The highest levels of cortisol are found in those born by assisted vaginal delivery using forceps or vacuum extraction.
皮质醇水平最高的是那些通过手术钳或真空抽取而娩出的婴儿。
There are four models of electronic document delivery systems: automatic model, human assisted model, network access model and network subscription model. 8 refs.
实现电子文献传递系统的方式有：自动方式、人工辅助方式、网络访问方式和网络订购方式。参考文献8。
Conclusion: Antepartum monitoring assisted by central electric-fetal monitoring system can improve the prenatal prognosis and increase the rate of cesarean delivery.
结论：利用中央电子胎儿监护系统进行产前监测，可改善围产儿预后，增加手术产率。
Ultrasound-assisted gene delivery is associated with the parameters of ultrasound exposure, such as mechanical index, pulse repetition frequency, time of exposure, and so on.
超声的此种特性，与超声的照射条件，如机械指数、脉冲重复频率、照射时间等有关。
Conclusion: Antepartum monitoring assisted by central electronic fetal monitoring system can improve the perinatal prognosis and increase the rate of cesarean delivery.
结论利用中央电子胎儿监护系统进行产前监测，可改善围产儿预后，减少手术产率。
Conclusion: Antepartum monitoring assisted by central electronic fetal monitoring system can improve the perinatal prognosis and increase the rate of cesarean delivery.
结论利用中央电子胎儿监护系统进行产前监测，可改善围产儿预后，减少手术产率。
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