Patient's question:
Prenatal Down syndrome screening. Prenatal Down syndrome screening. Prenatal Down syndrome screening. What are the common tests for Down syndrome?Doctor's answer:
Hello, the Down syndrome screening is a method that measures the concentrations of alpha-fetoprotein, human chorionic gonadotropin, and free estriol in maternal serum by extracting maternal serum and combining it with the expected birth date, weight, age, weight, and blood collection time. Gestational age is used to calculate the risk factors for the birth of a fetus with congenital defects. Typically, the "ultrasound" and "blood draw" screening methods require about 10-14 weeks. Between the 15th and 20th weeks, the hospital will collect blood samples and will test the levels of serum alpha-fetoprotein, human chorionic gonadotropin, free estriol, and statins.