Do you have to do an ultrasound for Down syndrome screening?

Patient's question:

No

Doctor's answer:

Analysis of the condition: Hello, the Down syndrome screening does not require an ultrasound.
Guidance: Down syndrome screening is a method that involves drawing pregnant women's blood serum to detect the concentrations of alpha-fetoprotein, human chorionic gonadotropin, and free estriol in the mother's serum. It also combines the pregnant woman's estimated due date, weight, age, weight, and gestational age at the time of blood collection to calculate the risk coefficient of giving birth to a child with congenital defects. Therefore, it is a blood test, not an ultrasound, so there is no need to worry.