Genetic abnormalities seen on CVS in early pregnancy failure

Area of Science:

• Reproductive biology
• Human genetics
• Cytogenetics

Background:

• Early pregnancy failure (EPF) is a common complication affecting reproductive outcomes.
• Cytogenetic analysis of chorionic villus sampling (CVS) or products of conception (POC) is crucial for understanding the etiology of EPF.

Purpose of the Study:

• To determine the frequency and distribution of chromosomal abnormalities in women experiencing EPF.
• To investigate the correlation between maternal age and chromosomal abnormalities in EPF.

Main Methods:

• Retrospective observational cohort study analyzing chromosomal data from CVS or POC karyotypes.
• Samples were collected from December 2011 to April 2015.
• Cytogenetic testing was performed on CVS samples, with POC analysis used if CVS yielded no results.

Main Results:

• Out of 130 samples, 73.0% exhibited abnormal karyotypes.
• The most prevalent abnormalities were trisomy (41.3%), triploidy/tetraploidy (14.0%), and monosomy (12.4%).
• Abnormal karyotypes in EPF were significantly associated with increasing maternal age (p < .01).

Conclusions:

• The study demonstrated a high detection rate of aneuploidy in EPF.
• Trisomy, triploidy/tetraploidy, monosomy, and structural rearrangements are the primary chromosomal abnormalities in EPF.
• Maternal age is the strongest correlating factor with aneuploidy in early pregnancy failure.