The position of the fetal heart is normal, the cardiothoracic ratio is not abnormal, and the presence of a four-chambered cardiac cross structure indicates that the gross structure of the fetal heart is normal at the time of the examination. Fetal heart ultrasound is usually performed between 20 and 28 weeks of gestation, when the fetal heart is more developed, the amniotic fluid volume and the size of the fetus are moderate, and it is relatively easy to visualize the structure of the fetal heart. The position of the heart is normal, the cardiothoracic ratio is normal, and the presence of the criss-cross structure indicates that the heart is of normal size and that the four chambers are normally present. However, it does not allow the visualization of smaller malformations and only means that there are no large structural malformations at the present time, which does not necessarily mean that there will be no malformations in later growth and development. It is advisable to follow the doctor’s instructions for regular checkups during pregnancy and to seek medical attention if there are any special conditions.