Fetal shaking in the stomach may be normal fetal movement or normal phenomenon caused by fetal hiccups, or it may be related to calcium deficiency. 1. Normal fetal movement: when the fetus moves in the mother’s uterine cavity, it can cause symptoms of trembling by stimulating the nerves of the mother’s abdominal wall, which is a normal phenomenon, and excessive tension should be avoided and mood should be relaxed. 2. Fetal hiccups: the fetus in the uterine cavity there will be swallowing and gastrointestinal peristalsis, when swallowing amniotic fluid may appear hiccups, which leads to the fetus in the stomach trembling, is a normal phenomenon, the pregnant woman regular checkups, to avoid excessive exertion can be. 3. Fetal calcium deficiency: if there is a lack of calcium can also cause fetal convulsions, tremors, this time to follow the doctor’s advice to supplement calcium. If the symptoms of the fetus shaking in the stomach are not relieved for a long time or even aggravated, it is recommended to consult a doctor in time, complete the ultrasound and other examinations, and find out the cause of the problem and actively treat it, so as to avoid delaying the condition.