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

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

Methods: 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.

Results: 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.

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