The majority of 32-week fetal arrhythmias are benign processes in cardiac development that do not require specific intervention and have a favorable prognosis, while 10% can present with life-threatening hemodynamic compromise, ultimately leading to fetal hydrops and death. Fetal arrhythmias can be caused by many factors, such as structural malformations, infections, medications, maternal autoimmune diseases, etc. Clinical auscultation can detect the presence of fetal arrhythmias, but there is no way to determine the nature of the arrhythmia and its impact on the fetus. Fetal echocardiography is the most effective noninvasive method for direct visualization of atrial and ventricular walls, valves, and blood flow within the heart. If fetal arrhythmia is detected during pregnancy, it is recommended that the patient seek prompt medical attention to clarify the cause of the condition and give targeted treatment if necessary.