In the past ten years, domestic and foreign investigation data and statistical reports show that: congenital heart disease is the most common birth defect disease in children, the incidence rate is about 8 per thousand, China about 15-20 million new cases of congenital heart disease patients every year, one-third of infants due to the seriousness of the disease did not get timely treatment and died within one year, one-third of the patients due to the delay in the treatment of the loss of the opportunity to operate. As early as more than ten years ago, foreign countries carried out the diagnosis of fetal congenital heart disease, so that critical congenital heart disease can be timely treatment after birth, the success rate of surgery has greatly improved, forming a new mode of prenatal diagnosis and postnatal treatment integration, fetal medicine has been greatly developed. Fetal medicine in China has just started, mainly concentrated in big cities, in Nanjing, Jiangsu Maternal and Child Health Hospital, Nanjing Maternal and Child Health Hospital, Gulou Hospital Obstetrics Department have prenatal diagnosis center, Jiangsu Maternal and Child Health Hospital Obstetrics and Pediatric Cardiac Surgery Department jointly take the lead to carry out the prenatal diagnosis of postnatal treatment integrated diagnostic and treatment modes in the province, so that a lot of critical congenital heart disease in the fetus on the diagnosis, and after birth in the pediatric cardiac surgery department under the guidance of experts in real-time treatment, do not let the fetal medicine has been greatly developed. After birth, many critical congenital heart diseases are diagnosed in the fetus and treated in real time under the guidance of experts from the Department of Pediatric Cardiac Surgery, so that the child will not lose the best time for treatment. At the same time, experts from the Department of Pediatric Cardiac Surgery, in collaboration with the Maternal and Child Health Hospital of Nanjing City, carry out prenatal diagnostic expert consultation, so that it is convenient for pregnant women to get timely consultation.