The 11-14 weeks scan - KH Nicolaides, NJ Sebire, RJM Snijders, AP Souka

Chapter 2

SONOGRAPHIC FEATURES OF CHROMOSOMAL DEFECTS

Each chromosomal defect has its own syndromal pattern of detectable abnormalities. This chapter describes the sonographic features of trisomy 21 and other major chromosomal defects in the first and second trimesters of pregnancy.