What is the probability that the fetus has Down syndrome???

Patient's question:

On the 22nd of this month, I had prenatal screening. The test results indicated that I am in the high-risk group for Down syndrome. The coefficient shown on the report is 1/129. The doctor recommended that I undergo further testing. Could you please tell me what is the probability of being diagnosed with Down syndrome?

Doctor's answer:

Analysis of the condition: Hello, your screening results can only indicate that your baby may have Down syndrome, but it is not a definitive diagnosis. You should undergo amniocentesis for prenatal diagnosis. Amniocentesis examines chromosomes, and the diagnostic rate is very high, with minimal error and no significant risks.
Recommendation: It is recommended that you undergo prenatal diagnosis today to rule out Down syndrome and address the situation as early as possible.

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