Mid Down should be referred to during pregnancy Down syndrome prenatal screening test is also known as Down’s syndrome screening, Down’s syndrome screening time for early pregnancy 11 ~ 13 + 6 weeks, mid-pregnancy 15 ~ 20 weeks period.
1. 11~13+6 weeks in early pregnancy: This time period can be used to determine the risk of fetal trisomy 21 by screening for chorionic gonadotropin and free estrogen, combined with obstetric ultrasound.
2. 15-20 weeks of mid-pregnancy: Chorionic gonadotropin, free estrogen, and alpha-fetoprotein can be detected by blood sampling to determine the risk of trisomy 21 in the fetus.
Down’s syndrome screening is a special test that determines the risk of the fetus having Down’s syndrome by testing the pregnant woman’s blood for serum levels of chorionic gonadotropin, free estrogen, alpha-fetoprotein, unconjugated estriol, and inhibin A. The test is performed during pregnancy.
Down’s syndrome screening is a very important test during pregnancy, and pregnant women should complete the test within the appropriate timeframe under the guidance of their doctor.