If your doctor didn't recommend a CVS test in your first trimester you'll need to consider prenatal testing now.

如果医生没有在你怀孕前期建议你做绒毛膜绒毛样检的话，你现在需要考虑下做个产前检查了。

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There is a short window of opportunity for a CVS test (usually between 10-12 weeks) and, similar to an amniocentesis, it carries a certain risk of miscarriage.

可以做CVS测试的时间窗非常短（通常10-12周），这个测试类似于羊膜穿刺术，并有一定的流产风险。

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We were told that there was a 99% likelihood that the results of the blood test were accurate, and that my wife needed a CVS test (chorionic villus sampling) to confirm these results.

我们被告知，血液测试结果的准确性有99%，同时我的妻子需要做一个CVS测试（绒毛膜取样）以确认这些结果。

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