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Prenatal diagnosis for chromosome abnormalities: past, present and future
1Cytogenetics Department, Guy's & St Thomas' Hospital Trust, London, UK. caroline.ogilvy@kcl.ac.uk
Pathologie-Biologie
|June 5, 2003
Summary
Prenatal diagnosis for chromosome abnormalities, like Down's syndrome, now offers rapid results using FISH and PCR. Future non-invasive methods using fetal cells from maternal circulation promise further advancements.
Area of Science:
- Medical Genetics
- Prenatal Diagnostics
- Cytogenetics
Background:
- Prenatal diagnosis for chromosomal abnormalities has existed for over 30 years.
- Traditionally, invasive sampling followed by karyotype analysis yielded results in ~2 weeks.
- Down's syndrome is the most common reason for prenatal diagnosis referrals.
Purpose of the Study:
- To review advancements in prenatal diagnostic techniques.
- To discuss the impact of rapid testing on genetic counseling and patient management.
- To explore future directions in non-invasive prenatal testing.
Main Methods:
- Review of established and emerging prenatal diagnostic technologies.
- Analysis of traditional karyotyping versus newer methods like FISH and quantitative fluorescence-PCR.
- Discussion of the clinical implications of different diagnostic turnaround times.
Main Results:
- Rapid diagnostic techniques like fluorescence in situ hybridisation (FISH) and quantitative fluorescence-PCR provide Down's syndrome results in 1-2 days.
- These advancements allow for targeted testing, reducing complex counseling scenarios and unnecessary terminations.
- Unexpected findings like balanced chromosome rearrangements can be better managed with faster results.
Conclusions:
- Rapid prenatal diagnostic methods improve patient care and reduce psychological burden.
- Targeted testing based on indications enhances efficiency and reduces iatrogenic risks.
- Non-invasive prenatal diagnosis using fetal cells in maternal circulation represents the future frontier.