[Application value of chromosome microarray analysis for prenatal diagnosis of fetus with ultrasonic abnormalities]

To assess the application value of chromosomal microarray analysis (CMA) for prenatal diagnosis of fetus with ultrasound abnormalities.

For 293 fetuses with ultrasound abnormalities (including 168 with structural abnormalities and 125 with non-structured abnormalities) but no common chromosomal abnormalities, CMA assay was performed.

Sixteen pathogenic copy number variants (pCNVs) were detected by CMA with a detection rate of 5.46%. The detection rates were 5.95% (10/168) for those with structural abnormalities and 4.80% (6/125) for those with non-structural abnormalities.

Compared with conventional karyotyping analysis, CMA can improve the detection of fetal chromosomal abnormality and provide an effective means for prenatal diagnosis.