The most common types of pregnancy-related heart disease include the following three types: 1. Structural abnormal heart disease: structural abnormal heart disease is congenital heart disease, for example, common atrial septal defect, ventricular septal defect, arterial ductus arteriosus, in addition to tetralogy of Fallot, Eisenmenger syndrome, etc., as well as rheumatologic heart disease, for example, mitral stenosis, mitral closure, aortic stenosis, aortic closure, etc.; 2, Abnormal function heart disease: there is no structural problem but there is a problem with the function, for example, various arrhythmias, supraventricular tachycardia, sinus node syndrome; 3. Pregnancy-related heart disease: there is no functional or structural change, but heart disease changes will occur after pregnancy. For example, hypertensive disorders heart disease in pregnancy, because hypertensive disorders heart disease in pregnancy leads to an increase in systemic peripheral resistance, systemic small arterial spasm, cerebral peripheral resistance increases, the heart needs more energy for pumping, so it is prone to left ventricular enlargement, myocardial blood supply and oxygen supply is insufficient, leading to heart failure. Perinatal cardiomyopathy, which may occur during late pregnancy to 6 months after delivery, is a heart disease in which unexplained enlargement of the heart is the main symptom.