When is nuchal translucency screening done?
Nuchal translucency screening can only be done between 11 and 13 weeks 6 days of pregnancy. An ultrasound measurement of the baby called a crown to rump length, which measures the baby from the top of the head to their bottom, is used to determine your dates and make sure your pregnancy is between 11 weeks and 13 weeks 6 days. • If your pregnancy is earlier than about 11 weeks along, your nuchal translucency screen may be re-booked • If you are more than 13 weeks 6 days pregnant, your prenatal care provider can give you information about other prenatal screening tests that may be available. How accurate is nuchal translucency screening? The detection rate is 70 percent, meaning that if a baby has Down syndrome, nuchal translucency screening will detect it about 70 percent of the time. Nuchal translucency screening does not detect all chromosome conditions, birth defects or other genetic conditions. How is nuchal translucency screening done? The nuchal translucency measurement is done b