Fetal movement and contractions are two relatively common phenomena during pregnancy and often affect each other, but when normal fetal movement occurs in women with normal pregnancy into the middle of pregnancy, it usually does not cause contractions. If the fetal activity is large and the fetal movement is frequent, it may stimulate the uterus to have contractions, especially for the more sensitive pregnant women, the fetal movement can easily stimulate the contractions to occur. Pregnant women can feel slight fetal movement at 16-20 weeks, and as the pregnancy week increases, the fetal movement also gradually increases. When the fetus moves more in the uterus, it may stimulate the uterine wall to trigger contractions, which can be strong or weak, sometimes with a feeling of tightness and hardness or slight pain in the stomach. When contractions occur in the uterus, the two conditions can be interchanged because the contraction of the muscles of the uterine wall can also stimulate the fetus and cause it to move in the uterus. These irregular contractions have no effect on the fetus. If a woman with pregnancy complications has contractions induced by normal fetal movements, resulting in increased pressure in the uterine cavity, abdominal pain, or even bleeding, dilatation of the uterine opening, and other signs of preterm abortion, she should seek medical treatment according to the situation. Some fetuses may have frequent fetal movements due to intrauterine hypoxia, thus stimulating the uterus to have contractions, and it is generally recommended to seek medical attention when contractions are frequent.