OBJECTIVETo detect numerical chromosomal aberrations and copy number variations (CNVs) in abortus tissue samples with a benchtop semiconductor sequencing platform (SSP).

METHODSOne hundred and forty patients with early spontaneous abortions at between 7 and 16 weeks were selected. Following DNA extraction, library preparation, high-throughput sequencing was carried out.

RESULTSChromosomal anomalies were detected in 82 cases (58.57%), which included 67 aneuploidies and 15 CNVs. Trisomies 16, 21, 22, and X/Y were the most common. A significant difference was found in the anomaly rates between women <35 and ≥35 years old (P< 0.01).

CONCLUSIONThe SSP platform can detect chromosomal aneuploidies and CNVs among abortus tissues. Numerical chromosomal aberration is the main cause of early spontaneous abortion, and advance maternal age is a high risk factor for chromosomal abnormality.