目的 分析死胎死亡原因及可能的相关因素，为降低死胎发生的措施提供依据。 方法 对2007年1月－2011年12月住院分娩的609例死胎（≥28周） 的病例资料进行回顾性分析,包括对产检次数差异、死胎性别、死胎孕周分布、母亲年龄差别、母亲文化程度等进行统计分析。 结果 ① 死胎的原因依次为：胎儿因素（41.2%），母体因素（24.1%），胎盘因素（21.7%）及不明原因（13.0%）；其中胎儿畸形、重度子痫前期及胎盘早剥为主要原因；② 母亲的文化程度低、未建卡或未正规产检者死胎发生的几率高于正规产检者，差异有统计学意义（P＜0.05）。 结论 加强围产保健，早期筛查胎儿畸形、防治妊娠期并发症及合并症等都有助于降低死胎的发生率。
ObjectiveTo investigate the effectiveness of different drug use regimens in preventing the development of preeclampsia in high-risk pregnant women in China. MethodsWe searched CNKI, Wanfang, VIP, Pubmed, Embase, and Cochrane library databases. Randomized controlled trials (RCTs) of published studies on the prevention of the onset of preeclampsia in high-risk pregnant women in China were searched between January 2000 and August 2024. After two investigators independently screened the literature according to the inclusion and exclusion criteria, extracted the data, and evaluated the included studies, a reticulated meta-analysis was performed using Stata 15.0 software. ResultsA total of 33 randomized controlled studies with 5 364 patients involving five pharmacological intervention regimens were included. Network meta-analysis showed that aspirin combined with vitamins and aspirin combined with calcium were more effective than aspirin alone up to 36 weeks in preventing the onset of preeclampsia. The results of the best probability ranking showed that aspirin combined with vitamins and aspirin combined with calcium had a higher probability of being optimal for preventing the onset of preeclampsia. ConclusionAspirin is effective in preventing the development of preeclampsia in high-risk pregnant women in China, but it is necessary to develop an individual combination management plan according to the patient's specific situation.