Heart disease in pregnancy is a common and serious obstetric comorbidity and a cause of maternal death. The incidence of combined heart disease in pregnancy is about 0.5%-3.0%. Combined heart disease in pregnancy can be congenital heart disease combined with gestation or new heart disease that occurs during pregnancy, such as hypertensive disorders in pregnancy and perinatal cardiomyopathy. The enlarged uterus and increased blood volume during pregnancy increase the burden on the heart to some extent. Normally, the heart can adapt to this change by compensating for it, but once the maternal heart function decreases, this extra burden caused by pregnancy can cause further decreases in heart function and even cause heart failure, which can be life-threatening. During pregnancy, although red blood cells are growing, the growth of plasma in the blood is much higher than the growth of red blood cells, so the concentration of red blood cells and hemoglobin is relatively reduced, resulting in physiological anemia, and in order to meet the blood supply of the body, the heart rate of pregnant women is higher than that of non-pregnant women, which increases the burden on the heart. During delivery, the uterus and the muscles of the body contract, and a large amount of blood rushes back to the heart, increasing the amount of blood returned to the heart by 30% to 40%, which makes the burden on the tense heart during pregnancy even heavier and makes the existing diseased heart more prone to heart failure. The way to get through pregnancy and delivery safely depends on the heart function. Therefore, strengthening physical exercise before pregnancy to enhance heart function is a simple and effective way to reduce heart disease during pregnancy and to prepare for the arrival of a new life.