For stillbirth evaluation, CMA is more likely than standard karyotyping to provide a genetic diagnosis, in part because it does not require dividing cells. he Stillbirth Collaborative Research Network found that when karyotyping was uninformative, approximately 6 percent of cases had either aneuploidy or a pathogenic copy number variant identiied with CMA (Reddy, 2012). Overall, CMA yields results nearly 25 percent more often than standard karyotyping alone.