From 2003 to 2007, 5,002 nulliparous women were enrolled in the trial: half were assigned to structured care and half to usual care.
从2003年到2007年，5002名未经产妇女登记进入实验：一半分配到结构护理组，另一半接受常规护理。
Methods We conducted a multicenter, randomized, double-blind trial involving nulliparous women who were at low risk for preeclampsia.
方法我们进行了一项多中心、随机、双盲试验，纳入先兆子痫危险低的未经产妇女。
Researchers conducted a telephone survey to examine the prevalence of and risk factors for PTSD among 1581 nulliparous pregnant women.
为了找出导致PTSD普遍原因以及危险因素，研究者们敌对1581名待产的妇女进行了电话调查。
Early menarche, late menopause, or late 1st pregnancy increases risk. Women who have a 1st pregnancy after age 30 are at higher risk than those who are nulliparous.
初潮早，停经晚，或首次妊娠晚，均可增加癌症危险。30岁后怀第一胎的妇女，其危险性要高于未产妇。
Objective To evaluate the effect of combined subarachnoid epidural analgesia (CSEA) in labor pain relief and its side effects and selective bias in nulliparous women.
目的研究按孕妇意愿选择蛛网膜下腔-硬膜外联合阻滞麻醉用于产时镇痛对分娩的影响。
Methods 60 cases of full-term nulliparous women that delivery in our hospital were randomly divided into the experimental group (30 cases) and the control group (30 cases).
方法选取在我院分娩的单胎足月初产妇60例，随机分为实验组和对照组各30例。
Objective: to investigate the application of cephalic presentation score in predicting the mode of Labour in nulliparous women with term singleton fetus with cephalic presentation.
目的：探讨头位分娩评分法在单胎足月头位初产妇分娩方式预测中的应用。
Objective: to investigate the application of cephalic presentation score in predicting the mode of Labour in nulliparous women with term singleton fetus with cephalic presentation.
目的：探讨头位分娩评分法在单胎足月头位初产妇分娩方式预测中的应用。
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