What Is the Normal Range for Trisomy 21? Understanding Diagnosis and Screening
Learn what trisomy 21 means, why there is no normal range, and how Down syndrome is diagnosed through screening and confirmatory tests.
What Is the Most Sensitive Test for Detecting Trisomy 21 (Down Syndrome)?
Learn about the most sensitive prenatal test for trisomy 21, non-invasive prenatal testing (NIPT), with over 99% accuracy in early pregnancy.
How Often Is Down Syndrome Misdiagnosed? Understanding Genetic Testing Accuracy
Learn about the rarity of Down syndrome misdiagnosis and the accuracy of genetic tests like amniocentesis and CVS.
Can Stress Cause Trisomy 21 (Down Syndrome)? Understanding the Causes
Learn why stress does not cause trisomy 21 and explore the true genetic causes of Down syndrome.
How Is Down Syndrome Diagnosed at Birth? Key Signs and Chromosomal Testing
Learn how Down syndrome is identified at birth through physical traits and confirmed with chromosomal karyotype testing.