đùi ngắn, trong khi tỷ lệ này ở thai nhi bình thường là 5%.
Gọi là xương đùi ngắn khi ≤ 90% so với trị số bình thường, hoặc < 3rd centile trị số bình thường, hoặc < 3rd centile
C.M.Rumack et al. Diagnostic Ultrasound. 3rdEdition. 2005. p1039-1055
Anthony O. Odibo, MD et al. Evaluating the Efficiency of Using Second-Trimester Nasal Bone Hypoplasia as a Single or a Combined Marker for Fetal Aneuploidy. J Ultrasound Med 2006
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TÀI LIỆU THAM KHẢOTÀI LIỆU THAM KHẢO TÀI LIỆU THAM KHẢO
C.M.Rumack et al. Diagnostic Ultrasound. 3rdEdition. 2005. p1039-1055
N. Perrot et al. Echographie Endovaginale-Doppler couleur en Gynecologie-Obstetrique. 2004 Obstetrique. 2004
Y. Robert et al. Echographie en practique Obstetricale. 2003
William Cusick, MD et al. Fetal Nasal Bone Length in Euploid and Aneuploid Fetuses Between 11 and 20 Weeks’ Gestation. J Ultrasound Med 2004. 23:1327- Fetuses Between 11 and 20 Weeks’ Gestation. J Ultrasound Med 2004. 23:1327- 1333
Katherine W. Fong et al. Detection of Fetal Structural Abnormalities with US during Early Pregnancy. Radiographics. 2004;24:157-174. during Early Pregnancy. Radiographics. 2004;24:157-174.
Jodi M. Barboza, MD et al. Prenatal Diagnosis of Congenital Cardiac Anomalies: A Practical Approach Using Two Basic Views. Radiographics. 2002;22:1125- A Practical Approach Using Two Basic Views. Radiographics. 2002;22:1125- 1138.
Wesley Lee, MD et al. Nasal Bone Evaluation in Fetuses With Down Syndrome During the Second and Third Trimesters of Pregnancy. J Ultrasound Med 2003 During the Second and Third Trimesters of Pregnancy. J Ultrasound Med 2003 22:55-60
Anthony O. Odibo, MD et al. Evaluating the Efficiency of Using Second-
Trimester Nasal Bone Hypoplasia as a Single or a Combined Marker for Fetal Aneuploidy. J Ultrasound Med 2006 25:437-441 Aneuploidy. J Ultrasound Med 2006 25:437-441