
To investigate the genetic burden in fetuses with isolated and severe fetal growth restriction (FGR) using trio whole‐exome sequencing (WES) with a typical chromosomal microarray. Fifty‐one fetuses with isolated and severe FGR and negative CMA results underwent trio‐WES. Genetic disorders involved in Cornelia de Lange syndrome (CdLS) and metabolic and skeletal genetic diseases. The present study indicates that trio‐WES can improve the effectiveness of prenatal diagnoses for isolated and severe FGR in cases with normal CMA results, aiding prenatal genetic counselling and pregnancy management for FGR fetuses.
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