**1. Introduction**

The chapter will be structured on four main sections: the normal ultrasonographic appearance of the fetal abdominal cavity and abdominal wall, the absence of the normal abdominal structures, abnormal structures present in the abdomen (cysts, tumors, etc.), and abdominal wall anomalies.

Abdominal anomalies that appear during intrauterine life are complex due to the number of different organs that are affected. In most cases, the ultrasound appearance is of a cystic image with different content, and the differential diagnosis is often difficult.

Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. © 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

© 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons
