Ventricular septal defect is one of the most common simple congenital heart diseases. Mothers-to-be should not be alarmed and should be aware of the following If a major ultrasound during pregnancy reveals a ventricular septal defect in the child’s heart, the first step is to go to a specialist hospital for a specialized fetal heart ultrasound to fully and carefully assess the condition of the heart. Secondly, because of the relatively small size of the fetus during pregnancy, the even smaller heart, the limited resolution of the ultrasound instruments, and the hemodynamic characteristics of the fetal circulation, with equal pressure between the left and right ventricles, the ultrasound signs of blood flow shunting through the defect are not obvious, so overall, the accuracy of fetal ultrasound diagnosis of septal defects is not as good as after birth, and there is a certain rate of false positives, especially for small defects, which means that the ultrasound looks at This means that the defect is present on ultrasound but not actually present. Third, regardless of the size of the ventricular septal defect, there is no effect on the growth and development of the child during the fetal period, nor does it interfere with normal delivery. Fourth, as the child grows and develops during pregnancy, there are several possibilities for the size of the ventricular septal defect to remain the same, to become larger, to become smaller, and to heal spontaneously, and this needs to be monitored dynamically by repeat ultrasound. A cardiac ultrasound should be done as soon as possible after the birth of the child to clarify the diagnosis in order to develop an appropriate treatment plan. Fifth, it is now generally accepted that ventricular septal defects of 3 mm or less in size do not require treatment. If the defect is larger than 3 mm, it can be cured by surgical or interventional treatment. According to the current medical technology, the success rate of treatment of ventricular septal defect can reach 99% in large specialized treatment centers for congenital heart disease; or even higher. If treated in a timely manner, the child’s growth and development, sports and life expectancy can reach normal levels after successful treatment. Sixth, the timing and cost of treatment of ventricular septal defects is determined by the size of the defect and the accompanying other cardiac malformations. In the neonatal period, even if the ventricular septal defect is relatively large, the pressure difference and fractional flow between the left and right ventricles are not significant due to the high pulmonary vascular resistance and pressure, so the impact on the child’s cardiopulmonary function and growth and development is not obvious. After the neonatal period, as the pulmonary vascular resistance and pressure decrease, the blood flow between the ventricles shunted through the defect increases accordingly, and the effects on the child gradually appear, which may include excessive sweating, difficulty in breastfeeding, less milk consumption, slow or no weight gain, and recurrent respiratory tract infections. Therefore, large ventricular septal defects often require early surgical intervention, as early as 2-3 months of age, with a hospitalization cost of about 50,000 RMB. Small and medium-sized defects are usually surgically treated around 1 year of age, with hospital costs of about $30,000-35,000. Interventional treatment is mainly indicated for less large muscular ventricular septal defects, as well as perimembranous ventricular septal defects where some of the defects are appropriately positioned, and is usually done around 2 years of age at a cost of about $30,000.