Fetal movement is the body movement of the fetus, which can be detected by ultrasound examination after 18 weeks of gestation. For women who are pregnant for the first time, they can usually feel fetal movement only at 20 weeks of gestation, and menstruating mothers may feel fetal movement earlier than primiparous mothers. At 18 weeks of pregnancy, first-time mothers usually do not easily feel what kind of fetal movement is, and gradually feel fetal movement after 20 weeks. The woman in labor may occasionally feel a bubble-like sensation in the abdomen at 18 weeks, and the thickness of the belly varies greatly, so the feeling of fetal movement is different. The fetal movement will be light and less frequent at the beginning, and there is nothing special about it, it may be on the left side or on the right side, the time may be at night or in the morning, these are all variable. The fetal movement will gradually increase with the progress of pregnancy, reaching a peak at 32-34 weeks of gestation, and the normal fetal activity is generally not less than 3-5 times per hour, and the number of fetal movements in 12 hours is about 30-40 times or more. After 38 weeks of gestation, fetal movement will gradually decrease again. In summary, the fetal movement may not be felt at 18 weeks of gestation, this situation is not to worry, it is a normal phenomenon, and will be felt at about 20 weeks.