Shortness of breath and frequent fetal movements during pregnancy may be caused by the lack of oxygen or the development of cardiac lesions in pregnant women. When reaching the middle or late stage of pregnancy, the fetus presses on the pregnant mother’s abdomen and chest cavity due to excessive development, which affects lung expansion and easily causes the pregnant mother to suffer from lack of oxygen and lead to respiratory difficulties, and at the same time, the fetus will move frequently due to lack of oxygen. In addition, if heart disease occurs during pregnancy, it will cause abnormal blood flow or blood circulation as well as pathologically increased oxygen consumption, and affect the fetus. As a result, the pregnant woman may experience chest tightness and shortness of breath, and the fetus may move frequently due to the reduced amount of oxygen in the mother’s body. There are other causes of shortness of breath and frequent fetal movements during pregnancy, so it is recommended to go to the hospital for a thorough examination and to cooperate with the doctor.