Fast heartbeat of pregnant women may be a normal physiological change during pregnancy, or it may be caused by pathological conditions such as anemia of pregnancy and hypertensive disorders during pregnancy. 1. Physiological reasons: during pregnancy, with the continuous growth and development of the fetus, the circulating blood volume of pregnant women will increase, the heart in order to complete the normal function of blood circulation, need to increase the number of beats, to meet the body’s needs, which can lead to pregnant women’s heartbeat faster, this is a normal situation during pregnancy, without special intervention. 2. Pathological causes: such as pregnant women combined with anemia in pregnancy, all organs are in ischemia and hypoxia, in order to deliver enough blood and oxygen to all organs in time, pregnant women’s heart pumps blood faster, which can lead to rapid heartbeat; some pregnant women combined with hypertensive disorders of pregnancy, which can lead to heart failure, and will also appear rapid heartbeat symptoms. In addition to the above, there are many other diseases that can cause pregnant women’s heart to beat faster, when abnormalities occur, pregnant women should consult a doctor to clarify the cause of the disease and timely treatment, so as not to delay the condition.