Implementation of a High-Resolution Single-Nucleotide Polymorphism Array in Analyzing the Products of Conception

Area of Science:

• Genetics
• Reproductive Medicine
• Genomic Analysis

Background:

• Pregnancy loss has significant emotional and clinical impact.
• Identifying genetic causes is crucial for understanding and managing recurrent pregnancy failure.
• Traditional methods may not detect all genetic aberrations contributing to miscarriage.

Purpose of the Study:

• To evaluate the utility of a whole-genome high-resolution single-nucleotide polymorphism (SNP) array.
• To demonstrate the array's value in diagnosing genetic abnormalities in products of conception.
• To elucidate the genetic underpinnings of pregnancy loss.

Main Methods:

• Utilized a whole-genome high-resolution SNP array.
• Examined 60 samples of products of conception (chorionic villi, fetal parts, fetal blood).
• Combined SNP array with single-nucleotide polymorphisms (SNPs) and oligonucleotide probes.

Main Results:

• The SNP array identified an abnormality rate of 38.3% (23/60) in the samples.
• Detected common aneuploidies and additional aberrations in 16.7% of cases.
• Identified copy number variations, triploidy, loss of heterozygosity, and low-level mosaicism.

Conclusions:

• The whole-genome high-resolution SNP array provides comprehensive genetic information, including copy number and heterozygosity status.
• Facilitates the discovery of novel genetic alterations associated with pregnancy failure.
• Enhances the management and counseling for subsequent pregnancies following loss.