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. Author manuscript; available in PMC: 2014 Sep 23.
Published in final edited form as: Cochrane Database Syst Rev. 2003;(3):CD003252. doi: 10.1002/14651858.CD003252

Table 2.

Complications after chorionic villus sampling

Type of fetal loss Combined total Combined proportions 95% CI
Less than 20 weeks of pregnancy 8/555 1.5 0.7-2.7
More than 20 weeks of pregnancy 4/555 0.8 0.2-1.7
Less than 22 weeks of pregnancy 11/665 1.7 0.9-2.9
More than 22 weeks of pregnancy 3/665 0.5 0.1-1.2
Less than 24 weeks of pregnancy 44/3402 1.3 1.0-1.7
More than 24 weeks of pregnancy 3/1775 0.2 0.03-0.5
Less than 28 weeks of pregnancy 229/12462 2.0 1.0-3.0
More than 28 weeks of pregnancy 17/10144 0.2 0.1-0.3
Less than 14 days after CVS 5/852 0.7 0.3-1.4
Less than 30 days after CVS 7/607 1.3 0.5-2.3
Less than 60 days after CVS 4/169 2.6 0.8-5.6
Less than 6 weeks after CVS 4/169 2.6 0.8-5.6
Total pregnancy loss 566/24457 2.0 1.4-2.6
Multiple insertions 1324/15693 7.8 3.1-14.2