Assertion: amniocentesis's risk | /r/HasProperty | around 1 in 700 women
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text: In this study the risk of miscarriage before 24 weeks was 0.81% in those who had an amniocentesis and 0.67% in a control group of women who did not have amniocentesis, suggesting that the overall risk was around 0.14% or around 1 in 700 women.