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Transabdominal chorionic villus sampling for rapid karyotyping in advanced gestation
M I Evans1, M P Johnson, F Koppitch
1Department of Obstetrics and Gynecology, Hutzel Hospital, Wayne State University, Detroit, Michigan 48201.
The Journal of Reproductive Medicine
|June 11, 1991
Summary
Late pregnancy fetal karyotyping using chorionic villus sampling (CVS) is faster and easier than percutaneous umbilical blood sampling (PUBS). This allows for timely clinical decisions regarding labor and delivery.
Area of Science:
- Perinatology
- Prenatal Diagnostics
- Medical Genetics
Background:
- Late pregnancy fetal karyotyping is crucial for clinical decisions but often delayed.
- Percutaneous umbilical blood sampling (PUBS) offers rapid karyotypes but has limitations.
Purpose of the Study:
- To compare the efficacy and ease of late-trimester chorionic villus sampling (CVS) with PUBS for fetal karyotyping.
- To evaluate the turnaround time and technical feasibility of extended CVS procedures.
Main Methods:
- Extended chorionic villus sampling (CVS) to the second and third trimesters.
- Comparison of karyotype results obtained from late CVS and PUBS procedures.
- Assessment of procedural time and technical difficulty.
Main Results:
- Karyotypes from late-trimester CVS were obtained more rapidly than from PUBS.
- The CVS procedure was found to be technically easier to perform in later pregnancy.
- Faster results from CVS support timely clinical decision-making.
Conclusions:
- Late-trimester CVS is a viable and efficient alternative to PUBS for fetal karyotyping.
- Extended CVS offers a faster and potentially simpler method for prenatal genetic diagnosis.
- This technique can improve management of late-pregnancy complications.