Fetal ultrasound screening
Fetal ultrasound screening is a type of ultrasound used in fetal screening during the pregnancy of a reproductive female. One function is to survey the anatomy of the fetus at 18-20 weeks. If normal, this decreases age related risk by 50%. Early ultrasounds at 11-14 weeks gestation are used to measure nuchal translucency, which identifies 75% of Down's syndrome newborns.