Laboratory performance of genome-wide cfDNA for copy number variants as compared to prenatal microarray

Table 2 Indications for testing

Screening indication	N (Percent)	Percent
Maternal age > 35	142	20.3
Positive serum screening	131	18.7
Ultrasound finding(s)	208	29.7
Personal/family history of CNV or aneuploidy	12	1.7
Other	19	2.7
Multiple indications	189	27.0
Total samples	701

ISSN: 1755-8166