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Abstract Objective: To evaluate technical characteristics of manual vacuum aspiration (MVA). Methods: We searched medical databases including CBMdisc (1978-2014), CNKI (1979-2014), Wanfang Database (1982-2014), VIP Database (1989-2014), PubMed (1966-2014), Cochrane Library by compute and manually searched other related journals to screen randomized controlled trials (RCT) that involved in the comparison of MVA and Electric vacuum aspiration (EVA). The quality of included trials was assessed. RevMan5.0 software was used for meta-analysis. Results: Five trials were included, in which 2 RCTs were graded B and 3 were graded C. The degree of cervical dilation of MVA was lower than that of electric vacuum aspiration (EVA). The cervical dilation time of MVA was shorter than that of EVA. The times which the suction passed in and out of the uterus in MVA group were less than that of EVA, showing statistically significant difference ［WMD (95% CI) value was -0.06 (-0.10，-0.01)］. Less noise was felt in MVA group than EVA group. Conclusion: Based on the current best evidence, MVA has better technical characteristics.
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