A small amount of fetal tricuspid regurgitation means that there may be tricuspid valve closure insufficiency, which may be related to fetal uterine insufficiency or suffering from congenital heart disease, and requires treatment if necessary. Tricuspid regurgitation, usually caused by premature closure of the ductus arteriosus or insufficient closure of the tricuspid valve, may be related to congenital heart disease or intrauterine developmental insufficiency. If the condition is more serious, it may cause the fetus to experience cyanosis, squatting, and respiratory distress at birth, and requires active treatment with tricuspid valve surgery. Tricuspid valve insufficiency may cause more serious consequences, so pregnant women need to actively accept the fetal heart dynamic ultrasound examination, also need to monitor fetal movement and fetal heart rate changes.