Fetal echocardiography is so important, but not many large hospitals currently perform this test. There are many reasons for this, including the low cost (currently the same as a normal examination), the long time taken (usually about half an hour), the labor intensity of the doctor, the high demand on the doctor’s own medical level and responsibility, and the uncertainty of the image, which makes it easy to miss the diagnosis and cause unnecessary medical disputes. Therefore, it should be especially stated that: due to the maternal body shape, fetal position, gestational age, small fetal body itself and special hemodynamic factors during the fetal period, prenatal fetal cardiac screening can only detect obvious fetal cardiac anomalies; arteriovenous ductus arteriosus, atrial defect, small ventricular defect, anomalous origin of coronary arteries, and partial type of abnormal pulmonary venous reflux cannot be diagnosed. Among the common congenital heart defects, perimembranous ventricular septal defect, atrial septal defect and patent ductus arteriosus (PDA) have the highest prevalence, and these three anomalies cannot be diagnosed in fetal life. However, the treatment of these precardiac diseases, which require diagnosis after birth, is still very mature, and the surgery usually does not affect the future growth and development of the child. At present, our hospital still insists on conducting this examination for the sake of clinical and pregnant women’s needs despite the large number of patients. We hope that we can work together to serve the majority of pregnant women to have healthy little babies with mutual understanding.