Fetal echocardiography is an ultrasound used during pregnancy to evaluate the structure and function of the fetus's heart. It can be indicated for fetal reasons like suspected cardiac abnormalities or arrhythmias, or maternal reasons like family history of heart disease or exposure to teratogens. The exam involves a sequential analysis of the situs, atria, ventricles, and great arteries using both grayscale and Doppler ultrasound. Standard views include the four-chamber, outflow tracts, and measurements of cardiac structures are taken. Documentation includes still frames and video clips of the key views and flows within the heart.