Question
When should I have the Down syndrome screening and 4D ultrasound fetal anomaly scan, and where should I go for them?
Answer
Condition Analysis: Hello, it is generally recommended to conduct the Down syndrome screening between 13 to 17 weeks of pregnancy to detect the risk of congenital chromosomal abnormalities in the fetus. Additionally, a detailed three-dimensional or 4D ultrasound scan should be performed between 22 to 26 weeks of pregnancy to check for the normality of most fetal organs. These tests usually need to be conducted in advanced medical institutions with state-of-the-art equipment and technology, such as local top-grade hospitals. Starting from the 20th week of pregnancy, regular prenatal checks should be conducted, with checks every four weeks before the 36th week of pregnancy, and once a week after the 36th week.