A month ago, a couple from Huizhou came to my office and presented the fetal heart ultrasound reports from several local and Guangzhou hospitals and our hospital, all of which showed that the fetus had a severe congenital heart disease, hypoplastic left heart syndrome. Based on our ultrasound report, we explained to the couple in detail the condition of hypoplastic left heart syndrome and the prognosis of surgical treatment. The obstetrics departments of several hospitals advised the couple to induce labor. “Hypoplastic left ventricle syndrome” is an extremely serious congenital heart disease in which the baby is born with cyanosis and shortness of breath, and most of them die of respiratory and circulatory failure during the neonatal period. The mortality rate of surgical procedures is high, and it takes three operations before and after, and the long-term prognosis is not ideal. When I saw their torn and expectant eyes, I carefully read the ultrasound reports of five hospitals and found that the diameter of the left ventricle measured by each hospital differed greatly, so I personally rechecked the ultrasound and found that the foramen ovale of the fetal heart was small, less than 2 mm, and the septum was expanded toward the left atrium, so the left ventricle was obviously smaller. At this time, the baby was 34 weeks +5 weeks of gestation, close to full term, and after communication with the couple, the obstetrician was invited to consult with them. I suggested that after obstetric treatment to promote the baby’s lung maturation, the pregnancy could be terminated in due course. The baby’s foramen ovale was so small that it would be difficult for the baby’s left ventricle to support circulatory function if it waited until 40 weeks of life. A week later, along with a cry, a baby with a full body of redness was delivered by cesarean section without any problems and was quickly taken to the monitoring room of the cardiac center, where all vital indicators were closely observed and found to be normal except for a slightly smaller left ventricle, which was found to be of normal size after seven days of observation. All indicators of the baby were normal and he was discharged successfully. As a pediatric cardiologist working in a maternal and child health center, giving their babies a chance to live is far more meaningful than a death sentence for these mothers-to-be who visit the hospital because of their fetal babies’ heart disease. During the fetal period, the heart is still developing and variable, and there are many uncertainties, so a single diagnosis is not a final one, and regular observation is still needed. In this case, although the right-to-left shunt at the atrial level was limited by the small size of the foramen ovale, resulting in a relative lack of volume in the left ventricle and its development lagging behind its gestational age, if the pregnancy was terminated in due course, the left ventricle would gradually develop after the baby was born as the pulmonary circulation was established and the blood flow back into the left atrium and left ventricle increased via the pulmonary veins. A lovely baby survived. This diagnosis of “left ventricular dysplasia” should be made with great caution in the fetal period!