In general, fetal heart malformations can be detected as early as five and a half months. The best time to check for fetal malformations is between 22 and 24 weeks of pregnancy, i.e. between 5.5 and 6 months. During this time, the fetal organs are mature and the uterus is more spacious, so the fetal position can be easily changed, allowing for better observation of the development of the heart chambers and valves and facilitating screening for fetal malformations. Therefore, it is recommended to go to the ultrasound department at 22-24 weeks of pregnancy for screening of fetal anomalies if the presence of cardiac anomalies is needed. It can detect obvious malformations such as cardiac ectopia, tetralogy of Fallot, hydrocephalus, spina bifida, ventral bifida, and short limb malformations. In addition, since some malformations occur in late pregnancy, such as digestive system malformations, women should have a pregnancy test once every half month in late pregnancy. At the same time, a good lifestyle should be established during pregnancy to maintain emotional stability and a happy mood and to ensure sufficient sleep.