Whether or not it is possible to have a normal delivery with a pericardial effusion of 7mm needs to be judged in the light of the patient’s condition. Generally speaking, normal delivery is not recommended in cases where pericardial effusion is generated at a rapid rate, or where pericardial tamponade even occurs. Pericardial effusion includes exudate caused by tumors, idiopathic pericarditis, and infectious factors, as well as leakage caused by severe circulatory stasis. When the fluid buildup is rapid or reaches a certain level, it can cause a significant decrease in cardiac output and return blood volume, resulting in clinical symptoms, i.e., cardiac tamponade, which may lead to severe dyspnea, making it difficult for normal delivery. Echocardiography is a simple, easy, rapid and reliable means of diagnosing pericardial effusion, and can be used to quantify and localize pericardial effusion and guide pericardial puncture and drainage, etc. When the amount of pericardial effusion is large, a “swimmer’s heart” may appear. Therefore, it is not possible to judge the patient’s condition by looking at a 7mm effusion alone, but rather by combining the nature of the effusion and other symptoms to determine whether a normal delivery is possible. It is recommended to consult a doctor when a pericardial effusion of 7mm occurs, and to determine the birth plan under the doctor’s guidance.