Patient's question:
At 16 weeks of pregnancy, I had the Down syndrome screening done, but I can't understand the report. How should I read the Down syndrome screening report?Doctor's answer:
Down Syndrome Screening: Early screening is typically performed between 10-14 weeks (more accurate). Mid-trimester screening is done between 16-21 weeks (if early screening is not recommended). Trisomy 21: ≥1:270 indicates high risk; 1:271-1:1000 indicates borderline risk; ≤1:1001 indicates low risk. Trisomy 18: ≥1:350 indicates high risk; 1:351-1:1000 indicates borderline risk; ≤1:1001 indicates low risk.