Question
How many times do I need to undergo a Down Syndrome screening? Some say it’s just once, between 16-20 weeks. Why do some say it needs to be done twice: Down Syndrome screening 1 and Down Syndrome screening 2? Please, doctors, enlighten us, thank you!
Answer
Case Analysis: The Down Syndrome screening only needs to be done once. Guidance: The best time for the Down Syndrome screening is between 15-20 weeks of pregnancy. If there is a high risk indicated, an amniocentesis and fetal chromosome test may be necessary.