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目的:研究IVF/ICSI治疗中影响单卵双胎发生的相关因素。方法:利用计算机检索Pubmed、Cochrane图书馆、Science direct、OVID、Web of science、万方、中国知网、维普、Sino Med、Open Grey等各数据库自建库至2015年4月13日所有公开或未公开发表的中文及英文文献,并手工检索纳入文献的参考文献。制定纳入标准,综合研究方法相似的研究,对不同影响因素的单卵双胎率进行meta分析。结果:IVF/ICSI治疗中行透明带操作与未行透明带操作的患者的单卵双胎率比较,差异无统计学意义(P>0.05)。IVF、ICSI、辅助孵化、囊胚移植、冻融胚胎移植治疗发生单卵双胎率分别为1.44%、1.51%、1.51%、2.17%和1.36%。结论:透明带操作并非导致单卵双胎发生的主要因素。
Objective: To study the related factors affecting the incidence of monozygotic twins in the treatment of IVF / ICSI. METHODS: The databases of Pubmed, Cochrane Library, Science direct, OVID, Web of science, Wanfang, CNKI, VIP, Sino Med, Open Gray and other databases were searched by computer independently until April 13, 2015 The published Chinese and English documents are not published and hand-searched references are included in the literature. To develop a standard study, a comprehensive study of similar methods, different factors affecting the monozygotic twin rate meta-analysis. Results: There was no significant difference in monozygotic twins rate between patients with or without zona pellucida treated by IVF / ICSI (P> 0.05). IVF, ICSI, assisted hatching, blastocyst transplantation, and frozen-thawed embryo transfer were 1.44%, 1.51%, 1.51%, 2.17% and 1.36%, respectively. Conclusion: Zona pellucida operation is not the main factor leading to monozygotic twins.