Question
What are the normal values for Trisomy 21 screening?
Answer
The normal value for Trisomy 21 screening should be less than 1270. The best time to perform this test is between 16 to 20 weeks of pregnancy. If the results are abnormal, the possibility of Down syndrome cannot be ruled out, and further observation of embryo development and consideration of amniocentesis are needed to make a definitive diagnosis. It is recommended to seek treatment at a third-level hospital’s obstetrics and gynecology department and choose an appropriate treatment plan based on the test results to ensure a good treatment outcome.