To determine the detection rates of all types of chromosome aberrations and the residual risk for postnatal diagnosis of an atypical chromosome aberration depending on the strategy for further investigation with either noninvasive prenatal testing (NIPT) or invasive testing in pregnancies with increased risk following combined first‐trimester screening (cFTS).

中文翻译：

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合并初孕筛查后发现非典型染色体畸变的产后诊断率和残留风险。

要确定各种类型的染色体畸变的检出率以及非典型染色体畸变的产后诊断的残留风险，取决于采用无创性产前检测（NIPT）或在合并初次合并后风险增加的妊娠中进行有创检测的进一步调查策略孕早期筛查（cFTS）。