Pregnancy belly jumping like a heartbeat is usually caused by abdominal aortic pulsation, fetal movement, fetal hiccups and other conditions. 1. Abdominal aortic pulsation: pregnant belly jumping like a heartbeat may be caused by abdominal aortic pulsation, in the case of thin pregnant women, due to the uterus increases pressure to the abdominal aorta, there will be a feeling of the stomach jumping problem. 2. Fetal movement: this generally occurs in late pregnancy, during which the fetus is gradually developing and maturing, it is easier to appear obvious fetal movement, there will be a belly jumping like a heartbeat like feeling. It should be noted that, in the case of such fetal movement, should also monitor the frequency of fetal movement, to avoid timely detection of fetal hypoxia. 3. Fetal hiccups: this is a normal physiological manifestation, the fetus is easy to hiccup when swallowing amniotic fluid, the pregnant woman will be able to feel the belly jumping like a heartbeat. It is important to note that pregnant women should do regular checkups to better monitor the condition of the fetus. If you find any discomfort, you should consult a doctor in time.