It is generally normal to feel fetal movement in the 4th month of pregnancy only when lying flat. Around 4 to 5 months of pregnancy, as the fetus is relatively small, you may feel less obvious fetal movement, so it is generally normal to feel fetal movement when lying down. However, there are some pregnant women who will feel more obvious fetal movement around 4 to 5 months of pregnancy, and everyone’s physical condition is different, so the feeling is also different. Some pregnant women are more obese and have thicker abdominal wall, they may not feel obvious fetal movement when the fetus is small, so there is no need to be overly nervous. Usually, you can regularly consult the doctor for fetal heartbeat monitoring examination to determine the development of the fetus, as long as the development of the fetus can be normal. During pregnancy, you need to pay more attention to rest, appropriate physical exercise, avoid staying up late.