Is the test for Down syndrome accurate and reliable? Which test is more accurate?

Patient's question:

No

Doctor's answer:

Analysis of the condition: Hello, it is a pleasure to assist you. Rest assured, the information provided is highly accurate.
Guidance: Currently, there are mainly two methods available, both of which have an accuracy rate close to 100%.
(1) Fasting blood draw to perform chromosome karyotype analysis.
(2) Fluorescence in situ hybridization (FISH) – this method also involves a blood draw and has the advantages of being fast and accurate.
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