The ductus arteriosus connects the pulmonary artery to the descending aorta. During fetal life it diverts most of the combined ventricular output away from the lungs toward the placenta. In full-te ...

Sixty test combinations were evaluated formed from combinations of 11 different ultrasound markers (nuchal translucency (NT), nasal bone, ductus venosus Doppler, maxillary bone length, fetal heart ...