
To investigate the efficacy and outcomes of chromosomal microarray (CMA) in cytogenomic evaluation of products of conception (POC). Over 42 months, 323 POC samples were tested by CMA. CMA identified cytogenetic abnormalities in 47.4% of first-trimester losses and 10.9% second and third-trimester losses. CMA and karyotype results were discordant in 20.0% of cases, most likely due to maternal cell overgrowth in culture. The most prevalent abnormalities identified in all losses were autosomal trisomies followed by triploidy. CMA outperforms karyotype analysis because it does not require viable, sterile cultures free of maternal admixture or admixture due to multiple gestations. Finally, CMA results can play an essential role in identifying increased recurrence risks for some couples.
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