1) Recognize the appearance of normal fetal anatomy and fetal anormalies that can be identified on first trimester ultrasound. 2) Understand the importance of the nuchal translucency for screening fetuses from 11-14 weeks gestation for chromosomal abnormalities and the criteria for obtaining an adequate measurement of the nuchal translucency.
Benson, C,
Ultrasound in Early Fetal Assessment (10–14 Weeks Menstrual Age). Radiological Society of North America 2006 Scientific Assembly and Annual Meeting, November 26 - December 1, 2006 ,Chicago IL.
http://archive.rsna.org/2006/4402473.html