[Fetal chromosome abnormalities diagnosed by chorionic villi sampling]

Area of Science:

• Prenatal Diagnostics
• Genetics
• Obstetrics

Context:

• Chorionic villus sampling (CVS) is a key prenatal diagnostic tool.
• Evaluating the safety and efficacy of different CVS approaches is crucial for patient care.
• Chromosome analysis via CVS provides vital information for pregnancy management.

Purpose:

• To assess the incidence of chromosomal abnormalities detected through CVS.
• To compare the complication rates, specifically spontaneous abortion, between transcervical and transabdominal CVS methods.
• To determine the preferred CVS technique for early-term prenatal diagnosis.

Summary:

• A 4-year study analyzed 387 CVS procedures for chromosome analysis.
• Chromosomal abnormalities were identified in 6.4% of cases, including autosomal trisomies, structural anomalies, and sex chromosomal aberrations.
• Transabdominal CVS (272 cases) had a lower spontaneous abortion rate (2.8%) than transcervical CVS (115 cases, 5.8%).

Impact:

• The findings support the termination of pregnancies with detected chromosomal abnormalities or X-linked diseases.
• The study highlights the transabdominal approach as a preferred method for early-term CVS due to its safety profile.
• This research contributes to informed decision-making in prenatal genetic screening and management.