Normal four chamber view. The apex of the fetal heart is anterior and to the left. The heart occupies around one-third of the area of the fetal thorax. A single rib is seen around the fetal thorax confirming that this is a properly orientated four chamber view. The left ventricle (LV) and right ventricle (RV) are of similar diameter. The left atrium (LA) is the closest cardiac chamber to the fetal spine. The right atrium (RA) is of similar size to the left atrium